What part, the Linux OS ? if so, I'd like you to cite your resources as I had assisted this in an older Telsa.
It's possible they were lying, I suppose, it would not be the first time, but it seems an odd thing to lie about.
Seems reasonable to not allow random downgrading because you didn't like the UI layout.
2 cents opinion.
The correct solution would be for Tesla to fix the design flaws, of course. Or maybe to actually test their own products to find such obvious problems before they are released.
If doing thing be requires doing thing a that is unreasonable, then just don't do thing b