if one switches to the new vector21 skin on laptop, chrome, it stops beeing responsive. there is a lot of white space on the left and right side and it does not use the default font of the desktop any more, especially the font size.
It is responsive here, using Firefox 93 and being logged in.
Which browser and version? Does this also happen in safe mode?
(For future reference, please fill out the bug report form - thanks!)
ah really, you r right. it is responsive from 0 to 50% of a small laptop screen. then it stops adapting. attached an editing window screenshot. looks same with firefox and chromium. if i click "legacy vector" it uses the whole screen width. adding ?safemode=1 does not affect the width as well.