For me, it's gaming, drivers, and still too much Windows-only software.
Wine/Proton has gotten really good, but still requires tinkering, and still sometimes has really bad performance.
WiFi/BT drivers continue to be really terrible, there's connectivity but speed and reliability sometimes aren't there. Peripherals and motherboard chipset functionality still mostly won't work.
Desktop environments are still clunky and rough around the edges. Maybe I don't get along with KDE/Gnome and just need to shop around for another DE.
Wine/Proton has gotten really good, but still requires tinkering, and still sometimes has really bad performance.
WiFi/BT drivers continue to be really terrible, there's connectivity but speed and reliability sometimes aren't there. Peripherals and motherboard chipset functionality still mostly won't work.
Desktop environments are still clunky and rough around the edges. Maybe I don't get along with KDE/Gnome and just need to shop around for another DE.