agreed man, have fond memories of tweaking themes for daily drivers like irc client, winamp foobar2000, compared to like spotify or discord now feels so neutered and limited in terms of customizing appearance.
They insist on doing everything themselves and ignoring all standards which just ends up looking ugly and broken.
One of my main passions in theming is making your entire system look cohesively styled. Hell, I’d rather have standard Windows look but every program using the system UI so at least it all looks the same. I despise Spotify, Discord, and all Electron apps for this reason. They look so amateurish.
On the bright side, with native Linux you can customize everything. It's so fun to customize your window manager, status bar, etc. and have everything look and work exactly how you want.