Getting cars onto portable, standardised software makes the chips much more of a commodity and should reduce supply chain issues a lot - you go from needing to source xyz specific microcontroller to just needing to source "a chip that can run iOS/android version x".

If it would be an environment like desktop PCs it would be awesome. If it would look like the Apple landscape it would suck.

For better or for worse (IMO mostly better), users care more about features than the tech that goes into making those features work