what doesn't make your butt sweat and slide are vented seats... not leather or "vegan leather".
In my experience, leather seats grip and breath better than cheap-o plastic alternatives.
Same goes for leather steer wheels.
Vented seats also work great. The combination of the two would be ideal. Either 1 of the 2 would be an improvement over what we get from Tesla.
automotive leather at the "Tesla level"
To be clear "Tesla level" plastic / PU / vinyl seats are the very
bottom of material food chain when it comes to automotive surfaces.
is very very rarely fine and uncoated leather (which does require a lot of maintenance and conditioning to keep it from cracking/ discoloring etc.) Typically it's a thin layer of leather *heavily* coated with some kind of polymer to make it durable and maintenance free.
Types of leather is a very interesting subject, indeed.
There are LOTs of leather sources (calves, lambs, kid goats, pigs, bison, buffalo ... to name but a few) and variations: natural grain or full-grain, processing, tanning, pigmentation, and embossing variations in the market. If one is curious, this is a good place to peruse:
www.leather-dictionary.com
I have leather in all my other current cars, and all the cars I've had since the college days (cloth seats in that car). Never EVER had a cheap plastic surfaces on my seats until I got a Tesla. Sadly, it's inferior.
My current oldest car is 2015 MY (2014 calendar) F80 M3. It has real, quality Merino leather, not some veneer, as you suggested.
Leather surfaces get rudimentary cleaning and conditioning every other year, nothing more. I spend <5% of the time on cleaning and maintaining the interior vs. exterior of the car. The leather seats are superbly supportive, comfortable, and show zero signs of wear after 8 years in service.
Leather surfaces can be done well, and it can be done right.
Tesla doesn't bother.
you will sweat on that leather just as nice as on "vegan leather".
That's not been my experience. Quiet the opposite - leather breathes better than plastic fantastic cheap-o surfaces.
And it's not "vegan leather".
It's PU plastic *sugar*.
Enjoy! (since you don't have any choice)