updates. the constant barrage of updates. the cpu, ram, and disk time needed just to 'check' for updates is horrible (it used to be a lot worse, too). and if you are still on an old-school mechanical hdd, those 'cumulative' updates are absolutely brutal every month with win10 or 11.

last week i booted-up a silverblue that hasn't been run in a couple months. 8gb, mechanical disk, not a speed demon either--3rd or 4th gen. i didn't even notice the updates were coming in until the notification popped up saying they were done.