Just updated to #KiCad 10.0 and let it use the default settings instead of importing my 9.0 settings (both options are always a gamble). Unfortunately even though my OS theme is dark it's used a light schematic theme.

:: my_eyes_spongebob.gif ::

Oh god, everything is wrong. Hopefully nuking the 10.0 config directory will retrigger the 9.0 settings import dialog.
That worked but it doesn't migrate ANY addons, not even color themes!