I currently have a feeler out for selling the car.
Here's the long version of the story: I really wanted an EV and was torn between the Mini and a Model 3. Between uncertainty regarding tax credits (BBB Act) and delivery times, I ended up placing an order for both back in November and figured I'd have some time to decide. I also have a Veloster N that's been my daily driver. In March, within a week of each other both cars were set to be delivered. I ended up buying the Mini and I was able to delay the Tesla for a few weeks, but it's delivery date is coming up again.
My plan is to keep two out of the three cars. I almost sold the Veloster to keep the Mini and Tesla, but decided that I would really miss not having a manual transmission, and there are some situations where it might still be nice to have a gas car. So now it's down to keeping the Mini or buying the Tesla. The Tesla is appealing because it can be an only car, comfortably carry more than one passenger, etc. My order pricing is also $5K lower than current pricing, so it's going to be a lot more expensive if I want to order it down the road. However, the Mini is so much fun and handles 90%+ of my driving needs.
So that's my situation. Basically the epitome of first world problems.
Having options is almost always a positive, and a fortunate position to be in. It all comes down to your specific wants/needs/priorities. No doubt you could quickly and easily on sell the Tesla at a profit if you wanted to, even allowing for the price going up while it was order.
Clearly from your choice of daily driver and your Mini mods, you're an enthusiast driver.
The Model 3, particularly the Performance that we currently have, is ridiculously and hilariously quick (recently my wife had a guy in an R8 try and take her at 3 consecutive sets of lights), of course that means on a public road, you can only use a small fraction of it's potential, like squeezing the throttle in very brief bursts. It handles and rides pretty well for what it is, in fact after my first test drive I told the sales guy that it was surprisingly good at being a car - as opposed to a piece of tech or rolling hype. It is also pretty practical with the range, supercharger network and the passenger/trunk space.
Of course, I have chosen to switch from the M3P to the Mini, as the Mini will fulfill pretty much everything we need, with much more engagement, albeit slower acceleration. The other car in our garage, my wife's car, is a 981 Boxster S, so it scratches the itches an EV doesn't. If there is the very occasional situation neither car fits the bill, then we'll just hire/borrow something for that (until the Rivian finally arrives).
For me, the Tesla is fast and practical, but nowhere near as fun as the Mini, which is still plenty quick for public roads and carving up traffic. Plus, I've been and done the Tesla thing, variety is the spice of life!