For a long time, there was a topic kinda like that for some niche or less-important topics. It only occasionally got updated, then wound up languishing for years with no updates (a lot of the linked topics within having become either irrelevant or woefully out of date). It was finally un-stickied at some point after more active moderation of the forums began some years ago and the CM actually started to use the "sticky post" section as something other than "the never-changing list where topics are sent to be unintentionally ignored and die." I'm not sure any staff-maintained one would work out any better if they tried it again.
Besides, there is already user solar_dome's running list of GOG's newsposts and staff-created forum topics (itself a stickied topic), which should allow one to find most of the formerly-pinned (blue-created) threads from the last few years, even if one has to sift through a ton of newsposts to do so.