Servo is another wip web browser, managed by the Linux foundation’s European branch. It’s a little less far along but is making relatively quick progress now. Apparently discord already mostly works, with sending messages currently being a problem.

There are some pretty corporate “open core” software companies tho, that’s a more grey area

Idk if the tech for 3d printers is really more complex. All of the parts are readily available, basically nothing needs to be specially made except the hot end (one single metal part)

The consumer experience for 2d printers worse IMO but that’s probably because I’m stuck on Windows with its terrible printing system