I found that there was a notification on https://meta.wikimedia.org/wiki/Meta:Babel#The_Vector_2022_skin_as_the_default_in_two_weeks?_ . That is no place for such major sitewide change, it should have been an RFC instead. Babel is saturated with all different kinds of newsletters and nobody discusses important configuration changes there. Here is an example of RfC to introduce a configuration change: https://meta.wikimedia.org/wiki/Meta:Requests_for_comment/Adding_a_local_rollbacker_flag_or_alternatives . It would have been highly inappropriate to just write "we are having this change done in two weeks unless anyone notices this discussion and says no" on Babel. Please stop disregarding community processes and undeploy the change.
See https://www.mediawiki.org/wiki/Bug_management/Development_prioritization#Why_wasn't_I_consulted_about_these_changes%3F .
Please do not reopen tickets; it is possible to add a comment without changing task status. Thanks.