Bambu has been adding controls to their printers to force commands from your slicer to go through their servers before being sent to your printer. This had caused some stuff to stop working, like 3rd party AMS systems.

One guy forked (copied it and made his own changes to) their code and removed the restriction. Bambu didn't like that and threatened him to take it down, while accusing him of falsely impersonating them to make API calls to their servers.

The dude is like "I didn't impersonate shit, I just forked your code." Bambu's code is just a fork of other open source software, all under an open source license. So they have no authority to tell someone not to fork their code, since it's all open source licensed.

So a lot of people have banded together to push back against Bambu and are ready to take them to court if necessary. They see this as a step by Bambu to try to make their printers more restricted (only use their addons, their filament, go through their cloud, etc).

Classic enshitification arc. They were a fast growing startup that engineered really good printers and software. People, especially newbies flocked to them because their software was easy to use and their initial print quality was very good without any tweaking or tuning.

But they were backed by private equity, and had to start showing higher and higher returns, they started locking in users with their proprietary cloud services.

They've been locking users in more and more recently, and just a few weeks ago, threatened a user with legal action for posting AGPL code up on their own repo. The code enabled users to use their Bambu printers without needing to sign into Bambu's cloud.

Now there is a big community backlash and Bambu is having to do PR damage control.