In themselves most software issues/glitches aren’t usually a major issue, just annoying, but, when something does become a problem it can take weeks or months to diagnose, get parts and fix things. A battery cell failure is a massive problem, luckily it doesn’t happen often but there are owners who’s cars have been to transported to dealerships hundreds of miles away all over the country as their local dealer has no idea so has it sent to another dealer who can diagnose the problem but isn’t qualified to work on the battery, he then sends it to another dealer who is the only one able to do the job. .
Exactly the problem I had, car was transported to local dealer who did not have diagnosis equipment for car, he then sent elsewhere and they did not have trained EV specialist, so mine ended up finally at 3rd dealership who diagnosed car and awaiting parts and who is 90 minutes drive away.