To me, it seems like this license makes the most sense for everyone. The designer(s) of the printer get to sell a printer that no doubt took more than a few days worth of work to go from idea to "hey look, it prints something", and everyone else gets to see how the design works, to either improve, or create a new design based on learnings from this project. Hopefully that brand new design is licensed more liberally!
But I sure as hell would love an open printer that has a less than ideal license, especially when the alternative is basically getting a new printer from one of four companies (Canon, Epson, HP... did I miss anyone?)
The world needs more open source hardware. I'm currently trying to tackle an open source washing machine and heat pump dryer in my spare time. Will it ever turn into a built project? Probably not, but I sure as hell want to make sure that every peice that I've worked on so far is released to the world if it means that the next few people can finish or fix the design.
The fact that we see __washing machines__ as something that's not worth supporting after 6 years is honestly disgusting to me. It's not a flat screen TV, I don't see the design of a washing machine improving radically in my generation.
But if it does, it should be able to be retrofitted, rather than replacing an entire machine.