I guess this is where I complain about this…
Recently the notification "New beta feature available for this page" started appearing for users visiting pages like Special:RecentChanges, Special:NewPages, etc. Unfortunately, since it was implemented as a separate notification on each individual wiki (which I suppose makes some kind of sense, since users may want it on one wiki they work on but not another), users who regularly visit such pages on many different wikis are forced to accept or decline it repeatedly. There doesn't seem to be an option to "never give me this notification again, regardless of what wiki I'm on" (or, conversely, "turn this on everywhere").
I help track article-count milestones at m:Wikimedia News and w:Wikipedia:Milestone statistics, so I have reason to check things like "Special:NewPages" on different Wikimedia wikis pretty much every day. This means I will potentially have to decline to use this feature hundreds of times (there are over 800 Wikimedia wikis).
I assume there is a time limit on how long these notifications will go on (I don't know), but in the meantime, is there a solution to this problem?