My Model Y, delivered within the last few weeks, has no panel gaps (edit: the panel gaps, measured with an $8 tool at delivery, are within spec). It was delivered in perfect condition and is garage safe. I can even park next to other cars safely.
Then my friend bought one, and it was as good as any other new car I've seen. It looked great.
I found that quite strange. Is it a roll of the dice based on where and when they're made, or would the demo models have come from a pool that were rejected for sale somehow?
China Gigafactory produced Teslas are typically higher quality than Fremont builds.
Edit: Ah, I see your edit. But if that's what's happening, it's not a line maturity thing. The new factory is the one making the good models.
EDIT: Compare to the top end of Chevy vehicle pricing: https://www.autoguide.com/new-cars/chevrolet/
It's firmly in BMW, Mercedes, Land Rover territory, not Chevy territory, which it's being compared against.