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Open Printer is a fully open-source inkjet with DRM-free ink and no subscriptions
(www.techspot.com)
This is a most excellent place for technology news and articles.
It's a thing. Print shops use these to print different formats, usually for size > office paper. I checked on DDG and could easily find a supplier in my country for sizes the fit the OpenPrinter. Not sure if the paper roll is cheaper or more convenient, given that you have to order from specialized stores, but certainly it's a great idea.