The updated blog post does change the legal position they have maneuvered themselves in within the EU.

Also,they are basically lying in their post:

We want to make it absolutely clear that all of these claims are entirely false: Bambu Lab will remotely disable your printer ("brick" it). Firmware updates will block your printer’s ability to print.

While:

Due to the importance of these updates, your product may block new print job before the updates is installed, and will immediately provide update notifications to help you understand the related information.

(TOS 7.4)

Additionally the required certificates of course have a expiry date and after that you won't be able to connect outside of developer mode.

Legally, they are also in hot water with their "no support" developer mode at least within the EU. First of all they can't remove support for functions that were present at the time of the sale. Additionally denying support within the warranty period for use that is within the normal use even if developer modes,etc. are used is considered illegal - they can ask Samsung, Google and Sony about their experience in court for those cases, they all failed.