This might entice me to use ink jet again.

Off the shelf ink jet is one of the most anti-consumer products imaginable.

Note the license is Creative Commons BY-NC-SA - which means non-commercial use only. In software terms, this is not open-source, but rather "source-available" - something like Elastic License,

In practical terms, this means there is no "second supplier" - you can only get the printer or its parts from Open Printer Team; and if the Open Printer Team decides to disband, then the printer will no longer be available. Third parties cannot even sell replacement parts or unassembled devices, the "NC" part of the license explicitly prohibits this. You might be able to print the parts on your own personal 3D printer (if you have one), but sending them to fab house for manufacturing is against the license.

This is great for Open Printer Team's bottom line, but not so great for consumer - don't expect the printer to be available for a long time, and I bet there won't be cheap replacement parts either.