[userbinator]

Allowing people to opt out of upgrades but keep their older FSD just means a bunch of vehicles on the road with depreciated safety features.

...which is perfectly fine and has been the status quo since the beginning of the automotive era --- vehicles only need to meet the safety requirements when they were manufactured.

[kyleee]

Not perfectly fine in the context of “move fast and break things” software dev cycle used for safety critical things like auto pilot. Out of date auto pilot versions are going to have vulnerabilities and bugs (known and unknown) that will likely cause death, destruction, etc. on public roads

[userbinator]

known and unknown) that will likely cause death, destruction, etc. on public roads

...and so do human brains...

As long as the driver is still liable, I don't see a problem.