Currently [[mw:Extension:UniversalLanguageSelector]] (ULS) is enabled on all Wikimedia wikis. Given bug 46306 and bug 56292 (and various duplicate bugs), I think we should consider possibly scaling back the deployment of the extension temporarily. I think this would have a few benefits:
- users who are currently experiencing performance issues would stop clamoring for a user preference to completely disable the extension;
- developers working on the extension would have slightly reduced stress to deal with the performance concerns; and
- it might allow us to try to better focus on which features are truly needed where, improving performance by eliminating unnecessary CSS or JS from being loaded on sites where ULS isn't really being used.
Submitted as an unconfirmed ticket for consideration.