It means future software updates will be year specific which I can’t see them wanting to deal with. You’d have to be very careful you don’t accidentally install an update that nerfs your top speed
Why are you assuming Tesla is going to limit top speed via a software update? There’s absolutely no evidence of that.
Relax everyone… Tesla adjusts all sorts of things on *new* cars (top speed, max power, software features like regen toggle, etc) without forcing changes on existing vehicles.