Turns out we probably should've gotten something else at that particular juncture due to life circumstances, but the process itself was painless.
Tesla (and maybe Rivian) don't feel like they'd do that. You order what you want, you get exactly that. I hope I never have to deal with a dealer again.
That said, the same seems to be happening to e-bikes in the bad direction. They've gotten expensive. You have to take what the dealers have or order through the dealer as the manufacture doesn't take direct orders. Then you have to pray the dealer doesn't sell the bike while you wait. That seems less likely with a bike but it's annoying that you have to go through a middle-company.
Perhaps the best part of the "service experience" is not having to go in for oil changes, brakes, and all the other stuff legacy cars require.
When I do walk in to get something checked out, I get an estimate via the app and can chat with someone before even dropping off the car, which is nice. Tesla servicing has been a good experience for me so far, and does make me want to order another Tesla when our ICE car dies a couple years from now.