Yeah, they have taken some things proprietary with software and hardware. This was done in response to Chinese manufacturers, and yes Bambu in particular, taking the proprietary pathway and not giving new ideas back to the open source community.

Now, Bambu making proprietary products is well within their right. But that makes life harder for a true open source manufacturer to make enough money to stay in business. So it ain’t taking 20/10 vision to read the writing on the wall if Prusa intends to stay in business. So there is a real need to protect themselves.