To date, I've only had minor-moderate severity issues in the first 2k-ish miles, like repainting a quarter panel, intermittent rattles & door alignment on my 2019 SR+.
As others have stated, the build quality and 'service' have been mostly amateur hour nonsense:
Paint work, with a loaner car, was put in a 'We Owe' / due bill at delivery. When I dropped it off, we set a few other work items like low tires, door/window seal alignment, etc. I know, should have refused the car. My fault there. I knew better, but its AZ, you
need a car, and mine was totaled.
After that paint work, I was given back a dirty car, covered in minor-moderate buffer trails / hologram, and fine/light scratching, with dirt/contaminants on the inside too, covering both passenger side doors and the passenger side windshield / dash / dash trim. Luckily, I could tell it was some type of polishing compound or wax flung from buffing w/ the doors open, and I was able to appropriately clean the areas without causing damage to the delicate dash/interior trim. This is not OK. Rule number one of returning a vehicle post-paint/body repair is that the vehicle be showroom clean when presented to the customer. Oh, and the tires were still low from temps dropping, despite the work order saying they'd addressed it. Later that evening on the freeway, I still had the same exact intermittent rattle coming from the left rear door, and gently pressing down on the soft upper trim of the door card still stopped the rattle. Since then several other small/intermittent rattles have joined the fray. I've got around 2k miles now. This does not bode well for the promised longevity of 300,000+ miles. I will drop in on the Scottsdale SC to make service appointments for this eventually. Screw that app nonsense. I'll go talk to an actual human.
I was so pissed when I had to take that dirty car back, that I wrote an angry email to the delivery teams and the SC. (Was out of time, had to go back to work. Plus, they were holding the $100/day loaner fee over my head) Since then, I've been totally ghosted by AZ team over email, and nobody ever answers the phone. Even though I was there to complain about being ghosted on email, the techs at the Scottsdale SC were pleasant to speak with when I stopped in again. Nice or not, they didn't help me either. *shrug* They did at least admit that numerous people at the facility received my email. The manager never got off the portable office phone she had stuck to her head, so I left again, without ever speaking to anyone that might be able to actually help. For crying out loud, it was just a basic buff job / paint correction, and some felt tape that was needed to make things right... None if that is rocket surgery
The end result is that after seeing the lack of build quality of missing/soft paint with blemishes, misaligned doors/seals, and watching me try to get my issues resolved, at least one of my coworkers is buying a non-Tesla BEV now. Previously, they were looking at the 3, and one of them was possibly doing an X too... They're cars are all still living, so they have the luxury of time to shop.
Tesla's inability to deliver a properly built car and resolve my issues in a timely manner has already cost them at least $7-10k in gross profit on 1-3 sales. At this point, I'm concerned about what would happen if something serious was wrong with my car, and whether or not they'll even be around to support this car in 5+ years when they keep treating their customers this way. The worst part to me is that, despite its quirks and drawbacks, charging at home is awesome, pre-cooling a car without idling an I.C.E. is the best automotive feature ever, and the 3 SR+ is easily the best driving experience in its price range. Wanh-wanh-waaahhhh.