I've had a long-standing issue with my Plaid that's taken it out of service for the last ~3 weeks with no end in sight.
The screens simply fail to boot. The center screen is on (you can see the backlight) but nothing will get the car to respond. Still drives, unlocks, dome lights work, etc., but it's pretty unnerving / dangerous to drive with no screens. I have no idea how much battery I have. I have used my phone for speed & navigation more than once now.
Weirdest of all is that the mobile app "sort of" works. The car is listed as not responding in the app, but controls like trunk and frunk still work. This is helpful as I would otherwise have to jump the tow hook to open the frunk.
First time it happened, disconnecting the 12V cleared it up (disconnect high voltage loop, pull up green tab on 12v, slide harness to left, unplug). The second time it lasted for 5 days until I opened a Service case and a software update from 2021.32.x to 2021.36.x seemed to have cleared it up. But now it's been happening again for the last 3 days.
Worst of all of it is that I have a broken flagship car that had already spent 3 weeks in the shop for another computer issue. This is going on 6 weeks out of service since July with little end in sight. The car computer likely needs a replacement but the local service center can't seem to get one.
Insult to injury? No loaner, $100 Uber credit. Yeah, that'll compensate for my $130k car being out of service more than a quarter of the time I've owned it.