There should be an open source, Linux based Printer operating system. Like OpenWRT for routers, also works with almost every device in the wild.

This would be such a relief for everyone. Come on, most printer firmwares are crap.

Remember Scannergate? Yep, the one about professional xerox scanners changing numbers in scanned document. Went unnoticed for 8 years and affected almost every workcenter even in the highest compression setting. Just because they wanted to save a few bytes by using pattern matching.