@ovasileva not sure if there's a special process for feature requests (or even if this should be in our team's backlog, since it relates to the language links), so apologies if I did the wrong thing here!

I can't imagine why you would remove it. It was a wonderful way to make the transition from the old Vector smoother, and to help people find the new location of the controls. I would suggest making its visibility an option or keeping it for unlogged users.

I mean, yes, for English Wikipedia where this design is a default for more than a year, it's not necessary anymore. On the other hand, there are dozens of other Wikipedias where it's going to become a new default; you shouldn't forget them.

We remove things because a hint on how the user interface looked years ago becomes less and less useful to current, present users as time passes by.