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The open-source, DRM-free Open Printer shows off a working prototype
(www.techspot.com)
This is a most excellent place for technology news and articles.
For anything beyond document printing, I agree with you. But for this use case, the fact that the print head is disposable is a good call. Large plotter printers have dump trays and maintainence cycles to keep the ink liquid and moving, the parts are more expensive to replace.
Because your only using the head and ink well independently, nothing is counting pages or stopping you from refilling it. Its the best of both sides of consumable parts.