Earlier quoted context omitted.
This sounds like pro-Bambu wishful thinking rather than an informed opinion. On what basis do you believe proprietary plugins or libraries are allowed under any conditions by the AGPLv3? And if you want to counter that you didn't say "under any conditions", I agree, but that means we need to discuss the particulars of this case to decide whether it's allowed or not. Bambu took existing open-source, AGPL slicer softwa…
Nah you cannot force proprietary library that consumed by fork of viral licenced app to changed it license. For example of this case is Apple Game Porting Toolkit which is fork of Crossover version of Wine GPL , Apple modified the code add dependency to their own implementation of DirectX's D3DMetal which is proprietary licensed library. So GPTK is composed with mixed GPL Wine app + propietary D3DMetal.
The illegality of Bambu Labs' actions results from the dependencies of the binary module on the AGPL app, not the other way around.