I suspect one of the main issues would be that in reality, most releases are actually multi-format. Most vinyl releases are available as downloads, many as CDs too. I'd also say that the main topics of any release discussion (before/after) are:
that the release is/was happening
the music itself (+ maybe linking it to the artist's / label's other production etc.)
So, there are very few releases that would be strictly vinyl-only and fairly few discussion points that would actually concern the vinyl format itself. If there's a vinyl+digital release, where would we put it? Directing digital buyers to a vinyl subforum would feel wrong. Splitting the discussion to two different places would be worse. What would we do in the vinyl forum topic? Discuss just the pressing while avoiding all references to the music?
Meanwhile, it could be informative to have the formats listed in post tags. However, my realistic prediction is that even if that was requested/recommended, the success rate would be less than 10%. Copy-paste announce-bots won't do that, and "normal users" aren't consistent with their tag use either.
I browse the forum almost exclusively through the "Activity" -button.