Regarding the automotive analogy, we live in a consumer-rights society. In the USA there is a right-to-repair law. A car maker must provide their OEM service information and tools to independent repair facilities. They do so, but clearly under duress. The price of a tablet computer with licensed OEM service software can be daunting.
With some wide and grand format printers costing as much or more than a vehicle, it seems like the same principle should apply.
I think it is in the manufacturer's interest to do this voluntarily, before government steps in and makes this mandatory and compliance becomes even more onerous.
Right to repair is being stripped away, however. Under the auspice of OEM's "worried" about their IP. Computer OEMs, vehicle OEMs, machinary OEMs are all (from how it appears) jumping on the bandwagon.
Ironically, cell phones are the one thing that consumers don't seem to mind being locked out of. I find that ironic.
Software was something that we never really owned, regardless of the license (had to get that good ole source code with it), but it's becoming like we don't even own the hardware as well. That hardware that we "bought" is going to be controlled post sale as well. In terms of where/how it gets repaired. Can forget about "modding" it (this includes just plain upgrading the internals), if "you" wanted to. Forget about working on it if you "wanted" to.
I've gotten so bad as I've gotten older, that I don't like not being able to do something. Even if I may never do it, I don't like it not being an option.