> But trying to interact directly with Bambu’s private infrastructure/APis seems reasonable for Bambu to block.

Even if they have taken away other routes that used to exist so that this is the only way?

I've also been very happy with my A1 (bought ~18 months go), and have since bought a U1 (which has networking problems of its own, but is otherwise a great upgrade) alongside it. Unless Bambu changes its tack significantly I'll not be buying another of their machines or more of their materials¹.

--------

[1] well, maybe the light grey PLA as I've not yet found anything similar enough easily available in the UK, and it is perfect for prints that I want to look neutral or for some scifi ships & similar…