We love to praise linux constantly and tell everyone to change to it (they should) but what are your biggest annoyances ?
Mine would be, installing software (made even more complex by flatpaks being added, among the 5 other ways there already were to install software) and probably wifi power management issues.
If using kde you can make it toggleble and by drfault hidden thats what I used, before switching to niri. Also assign a key to close the window.