It remains astonishing to me that this is controversial. Not everyone has the knowhow to block internet access to their printer, so having a toggle in firmware is terrific. I've verified after turning it on that it never phones home. Couldn't be happier.
Unless you're running qubes or some other virtualization setup their network plugin punctures whatever airgap you put around the printer and also gives them access to your system as well.
I see in my dns logs lots of repeated blocked requests to a Bambu labs domain whenever I have orcaslicer open. I assume it’s so many because it’s getting blocked and retrying.
I just print over lan though. Not using the Bambu servers (or the fork mentioned in OP) It works flawlessly.