Sure, but I don't know what their value proposition for their customers was. Except "we want to take a piece of the cake from Microsoft", which their customers didn't care about.
Yes, the problem is that the main reason people used Linux was because it was Free Software.
So a proprietary Linux didn't bring the usual benefits of Linux, it was just one more proprietary OS. And unlike BeOS or NeXT it didn't bring much to the table compared to Windows or other Linux distributions.
I believe that's why they make it impossible to remove without a sim card tool, so they can argue that it's an internal connection that the user is not supposed to remove.
It's not the harmless side effects they fear, it's (overblown) serious side effects that they fear. There is the Guillain Barré syndrome that is real but very rare, as well as a lot of imagined serious side effects like death.
To be fair, cars are becoming less and less serviceable.
I had a light bulb that died on my car, and tried to change it myself. How hard could that be?
Turns out the light bulb is so buried under the engine I ended up giving up and bringing it to the shop. And often even independent shops can no longer service cars, you have to bring it to your maker's dealership because only they have the proprietary tooling to fix it.
Who the fuck wears a VR headset walking in the street, let alone crossing a road?