You're saying people don't debt-finance Teslas?
I have a 2004 SUV with a 7" satnav in it and some god-awful software package. Does Acura offer an upgrade path for this? Other than a way to update the roads database, no. Buy a new SUV.
Neither does my iPhone 1. Lets hold off on this comparison until Tesla is still supporting 11 year old vehicles.
I've owned a number of cars for which I would have spent thousands of dollars with the brand upgrading them if options were available.
Almost every single car part can be "upgraded", courtesy of the aftermarket. It's not necessarily a worse system.