Telsa does model year changeovers in November.
Anything delivered after early November will likely have most of the planned enhancements for the next many months.
There are changes which have occurred due to supply chain shortages (matrix headlights in MYLR) which are temporary.
There are changes which have occurred because Tesla production processes and/or profits benefit (megacastings).
There's no timeline or published listing of new features, functions, etc. Except for the internet blogs, which are 99% hype.
Buying a Tesla has become similar to buying a PC.
There's always gonna be something else better, faster, sexier or cheaper that your neighbors will say you should have waited for.
Problem is, they're still paying $5 for a gallon of gas, while I'm paying $12 for a full tank.
At this point, there's absolutely nothing worth delaying a delivery for.
It's all good and getting incrementally better. Just not radically better, as it did early on.