The current trend seems to be making MediaWiki software/Wikimedia Foundation websites more newbie-friendly, which is what I'm all for, but it should not interfere with power users' options.
Good recent examples of this are the PostEdit and Universal Language Selector extensions, both of which are deployed on MediaWiki.org at least (where I'm an admin) and both of which cannot be turned off without CSS/JS hackery. This in unacceptable in my opinion.
We have the "Exclude me from feature experiments" user preference, originally introduced by the WikiEditor extension, which at the time was a part of the UsabilityInitiative extension (which in turn no longer exists), so it would be nice if new extensions could honor this preference. Cache fragmentation is more than likely happening for power users with heavily customized preferences, so that's not a valid excuse in this case.
Version: unspecified
Severity: normal
Whiteboard: aklapper-moreinfo
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=46306