Did you mean the I4 and not the M4? I had been following the M4 and really thought about going with it. I can't stand the face of the car but I was willing to look past it. In the end, I kept the course with the MY.
I would have hated to buy the I4 without a test drive. I have to say that despite all the crap leading up to the delivery of our MY LR, it has been an amazing car so far. Definitely a learning experience in some ways. A big plus is the size of the community around Teslas. Sure there are some Stans but a lot of other people who still love ICE cars and also have an idea of what good chassis tuning should be like.
The massive community has made it a lot easier to find workarounds, accessories, tips and tricks, and enhanced my user experience in ways I didn't anticipate. While I am a big BMW enthusiast, I don't think BMW will have the amount of I4's on the road anytime soon to get this level of community support AND aftermarket. The final thing that kept me in the Tesla camp (at least for now) is the super charger network. That is just so hard to beat.
In general, the MY has exceeded my expectations. It isn't perfect, some things really tick me off like, continuous price increases, the radar and lumbar support removal, but it is a damn good place to spend time behind the wheel so far. It has a lot more room than you think it would. I didn't know we needed 7 seats until we bought one from inventory, but now I am glad we did. I am definitely not a Tesla fanboi, but I really appreciate the value it has.
I am not sure the MY is my ideal but it was a good entry point into the brand. We have a Model S on order and that was my first choice but the lack of towing capability was an issue so we landed on the MY for now. If it wasn't for my wife, I probably would have bought the M3 performance and just stuck a hitch on it and chanced the warranty issues and still bought the S anyway. ;-)
I also looked at the Mach-E and it has a lot going for it. I hate to buy the first year vehicles as I've been burnt a few times doing this. Our local Ford dealer, like many, was clueless about the Mach-E so pretty easy to rule it out.