Vacuuming your place while you go get groceries is pretty nice, according to my late mother. And her favorite feature was: the thing easily fit under the bed, so she didn’t have to remind herself she was not as spry as she used to be.

USB-C enzyme?! Damn, that’s one universal bus!

Could someone tell Microsoft I switched to Linux ten years ago? They don’t have to encourage me anymore.

The only complex part of the hardware is the HP cartridge controller, and you have at least part of the work here: https://hackaday.io/project/176931-hp-printer-cartridge-control-module/details