Old forum sections don't get deleted, they just get merged into this "other" section as new platforms come out. ASUS does this to keep the section tidy rather than having a dozen platform subforums. This happens every time new platforms are released and it has nothing to do with official support commitments.
Regarding vulnerability updates, subscribe to the main thread:
https://rog.asus.com/forum/showthread.php?98738
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…