i think that customization in Linux shifted more to tiling wms and the stuff surrounding them (polybar/waybar, eww) tbh - things like base16 having a generic templating system so that you can generate themes for everything you need after putting together your own color scheme is also pretty pog (i got my own base16-pandora scheme into the proper base16 repos, which makes it pretty easy to use on whatever system i need to now)
it's definitely A Lot Weirder now but i think in terms of general flexibility, desktop Linux is there, but with a lot more work needing to be done to pick everything out and sculpt it all into something cohesive
i do miss the days of the aero theme and proper translucency n glassiness in my shells though....

