[flowless]

Amusing that their firmware repo (unlike Slic3r) had no reference to Marlin until I've pointed it out to them https://github.com/prusa3d/Prusa-Firmware/issues/2625

Also it was imported by copying the modified source instead of proper git fork with history and all the contributors that made it possible.

Since i3 was designed, there were always parts that weren't open (like the pictured PCB heated bed) so nothing really changes.