My biggest #Mastodon pet peeve so far is the fact that in the "Advanced Web Interface" a good 30-40% of my screen is simply left unused and the fix would be one line of #CSS: Putting `flex-grow: 1` on the `column` class.

And yet despite numerous issues raised about this since like 2018 (see https://github.com/mastodon/mastodon/issues/8632 for the list) it was only ever met with silence or the issue being closed with an irrelevant PR being linked.

I know how to use Tampermonkey or inject CSS. It shouldn't be necessary.