I understand the value to managing the hardware and software of your deployed devices centrally and with protection from users breaking things or becoming a road hazard, and the significant difficulties in developing for an automotive environment. I still wish we could buy Tesla's hardware and run something open source on it like we can with Apple.
Why would you buy hardware for double the going rate for a given set of specs and remove the OS that you paid so much for? Macbooks are OK, nothing against them, but I never understood who would buy one to run linux on. (I bought a Dell, and it actually included support out of the box)
Of course you can... first of all, the OS itself is (at least partially) open-source. Second, there's tons of apps in the App Store that are open-source. And third, you can obviously also compile open-source software yourself and install it too.
lol I own 2 macbook pros and a mac pro - wiped apple software off an installed linux on all of them. never looked back.
They all work great (a little bit of extra work setting up) - but you are right, I wouldn't have bought them if I knew I was going to ditch apple software ahead of time.