@ilovecomputers to be fair this has been a long running trend in desktop OS apps. It's nearly impossible to tell at a glance which app window is focused. At least for windows and Mac. I don't know if the Linux desktops do better in this area?
@teleclimber@ilovecomputers Depends on which one. Sway makes it dead obvious (at least with the default config). Bright blue for the active window title bar, almost-black for inactive ones. I think KDE is decent too, not sure about GNOME. MATE, LXDE, etc. probably decent too.