I should really stay out of the parts / ideas copying discussion (especially because I don't have a broad or deep knowledge of the aftermarket parts world), but I want to chime in on a tangential point that's been on my mind anyways:
Also, If you are really focused on the "EV Movement" then you should probably sell some stuff for non-Teslas. Right now it looks like you are pretty much focused on a single make, not broad support of the EV drivetrain or lower impact transportation.
And once there is another EV that is fun to drive on track that needs some upgrades, you'll be sure we'll be all over it. We were hoping more of the Ioniq range but it's still not quite inspiring enough.
I believe "needs some upgrades" is just as key to this as "fun to drive on a track."
By all accounts a Taycan is fun and handles itself well on a track or anywhere else, at least with the right options ticked. (I can't say firsthand, the Porsche dealer made me feel lucky just to
sit in their Taycan Turbo.
) However...it's a Porsche. If there's something Porsche is known for, besides farty flat sixes in the butt, it's sweating the details on suspension, braking, and other aspects of the driving experience.
Sure maybe a base 911 isn't all that special on the track vs other good sports cars (I don't know), but if you're serious in your Porsche tracking and start off with a GT3 or GT3 RS or whatever, you're basically getting a car that's kitted out from the factory like a good aftermarket tuner special. Sure there's no EV GT3 or GT2 Porsche yet, but the writing is on the wall there, and even the not-so-track-focused Porsches are usually not bad at all in the suspension and braking departments right from the factory, especially for street use. If you're not doing serious track time in your Taycan, it doesn't sound like there's much need or use for a better suspension or brakes or stuff like that. That is VERY DIFFERENT from a Model 3 or most Teslas to date! And let's be real, people looking for a Porsche to track aren't buying Taycans.
Don't get me wrong, I'm not a big Porsche fan or anything, I've never owned one and the few I've driven over the years didn't really called to me (though I haven't driven any of their "best" cars either). But it's clear Porsche sweats a lot of details that Tesla frankly doesn't, and there's much less need or use in attempting to upgrade your Taycan with a bunch of aftermarket handling and braking parts than your Model 3.
Now I know the Porsche sports car aftermarket is plenty strong, in no small part because they're popular to track and race, and
everything wears out or could use upgrading when get serious on the track. Obviously there are upgrades to be done, especially if you bought a regular 911 or Cayman or such but what you actually wanted was a GT4/GT3/GT2. But the Taycan is new, not many built yet even if 2021 sales were good for a Porsche, and it's definitely not the Porsche someone looking to build a track weapon is likely to buy.
.....
Elsewhere in the sporty EV market, there's also less modding upside than with a Model 3. The Mach-E GT thermal throttling looks so serious, nobody wants to touch that for a track or performance build, not to mention the crossover-ish height. Granted if someone managed to unleash its power there would be huge upside, but it sounds like there might be bottlenecks in the battery pack design itself...that's a tall order for the aftermarket to overcome. And you'd also have to reprogram or fool the software to remove its hardcoded time and speed based limits. Some companies have done software fooling on Teslas (MPP Party Box, Ingenext Boost, etc) but I suspect working around the Mach-E's thermal throttling programming would be another level. And most Mach-Es built are the much slower boring ones, the volume of potentially interesting ones (GT and GT PE) is still tiny.
The Polestar 2 Performance is actually pretty sporty for a family-friendly 4 door, but it's much more well-rounded from the factory than any Model 3. There's just not as much upside to modding it, especially for any street use. Also Polestar 2 sales volume seems tiny in North America (or at least in the USA), though I understand it's doing relatively better in Europe at least.
Are there any other non-Teslas even worth mentioning for sheer EV driving fun yet? Ioniq / EV6 are brand new now and I haven't driven them yet, but by all accounts MPP's take is right...it seems they drive well for what they are, but not competitive with the Model 3 as a platform for sheer EV driving fun.
.....
Last point I'll make is that Model 3 sales have dwarfed all these other cars right out of the gate. There's a variety of obvious reasons for that, but the result is not a single other truly sporty and fun EV is anywhere close to approaching the Model 3's sales rate or trajectory. Yes occasionally the aftermarket has really contributed to a car's popularity growth in a symbiotic way (e.g. Acura Integra, Subaru WRX), but I don't think that potential is there for any EVs currently. Model 3 was going to take off like a rocketship with or without the aftermarket. And sales of every new EV (and just about every car) are basically production-limited. The aftermarket isn't going to help sell more of them, the car makers can't even build more to sell.
.....
Why am I rambling on about this? Because I like EVs and I like fun-to-drive 4 door cars, and I'm looking forward to lots more coming on the market eventually. The Model 3 really impressed me at a fundamental level despite all the weak aspects as it comes from the factory. Tesla hit home run with it even if they did so with a cheap bat, squishy gloves, and a crack in their helmet. It's a very worthy platform to mod and no other EV seems close in that regard yet. Maybe if/when we start seeing EV equivalents of the WRX, Supra, etc there will be worthy competition for EV aftermarket parts development.