I have a Sept. '22 build GT. The panel gap to the trunk lid, and the rear door misalignment, and the charge port door is about the worst I've ever seen, but I don't care. I bought the car for the parts I can't see.
As for the software: I had a bad control module (supply issues during pandemic = alternate, unvetted sources of component ?) that was diagnosed and replaced. Since then ~ year + 9000 miles it's been flawless. The software updates are amazing = like it's your birthday. The remarkable thing is this car keeps getting better. I would not hesitate a second to get a deal on an early build.
Don't trust any review that duns the software. Everything has been "fixed" by continuing software updates. It's old news and should not be part of your analysis. For that reason, don't trust ANY review of the Lexus that was made before the recent update. It's a different car now.
I have one serious complaint: with latest update you can't turn off / avoid Highway Accident mode. You used to be able to switch it to just Adaptive Cruse, but recent update has eliminated it ???? HA is so dangerous it means I no longer have cruse control. Wish there was an "always off" button for HA, and that they would bring adaptive cruse back. Perhaps an update rollback option ? What I would really like is the option to eliminate HA entirely.