> Разницу заметят только пользователи легковесных wm. По данным systemd-analyze моя система
> загружается за 29 секунд, но в реальности в КДЕ она становится
> юзабельной только минуты через 3-4.

Предупреждали же:
> This number is nice and simple to understand -- and also easy to misunderstand: it does not include the time that is spent initializing your GNOME session, as that is outside of the scope of the init system. Also, in many cases this is just where systemd finished doing everything it needed to do. Very likely some daemons are still busy doing whatever they need to do to finish startup when this time is elapsed. Hence: while the time logged here is a good indication on the general boot speed, it is not the time the user might feel the boot actually takes.

Кстати, если не секрет - какое у вас железо?
И почему на такой слабой машины вы запускаете кеды вместо тех же легковесных wm?