The models that are a crappy PC can, almost like any or other crappy PC. Some have a very tiny DOM that might or might not be enough for a recent system. Of course, once the system is minimally up, it can use the big disk for software. No idea if any have special weaseling on them, but you can always search for the model and e.g. Debian (that tends to have best hits). Running with read-only root or just initrd is also quite possible.
The ARM models tend to be very very very slow and small and have architectures that are obsoleted in many Linux distributions combined with hardware that's weird enough that NetBSD doesn't support it (e.g. LAN chip or SATA, which you might need in a NAS). And yes, looking at NetBSD pages and build configs is one avenue for finding well supported devices. Although the documentation isn't great or complete. Some models may also have weird boot sequences or rescue modes that are extra hassle.
One obvious target might be rewriting from an unsupported, broken, and/or obsolete target to something that still works. Or moving a project from a platform that no other system in the company uses to the same setup that all the others use.
Of course it won't quite work, but I can definitely see why some people would want that.
Yes. There's the obvious difference of "it's a working printer" and desirable and useful product. You don't need to be state of the art to be in the first category was my thought.
Would be interesting to see that. I used to build it on Coherent, HP-UX, and Aix at least IIRC. Maybe others. It was kind of fun except for all the curses and termcaps.
The page mentions there's an emulator that should be able to run it. Don't know if there's a local copy that could be used along with some method to transfer the sources. Cloud boxes might not suffice.
Yes. It was a pretty big chunk, too. Floppies were around 880k and base model RAM sizes were 512k to few MB. Having better part of a meg of libraries in ROM really helps fit more stuff in. And it was possible to load RAM patches or shadow things IIRC.
"From scratch", ie raw materials only, probably limits the results to plotters until you've bootstrapped some presicion machinery. And electronics. How many parts you're allowed is going to be an arbitrary choice anyway.
But the heads being disposable and one day unavailable is kind of a valid concern if a new source doesn't eventually turn up.
There was no reason to sell a dot matrix printer that wasn't compatible with tractor feed. Especially when some of the biggest uses of those printers required that stock. Doesn't mean they required tractor feed paper to operate.
A Matrix printer is essentially a typewriter with extra steps and typewriters had been eating any paper for .. a century before?