Windows 10 has been the most reliable, productive, stable system for me over the past few years. No doubt they use a lot of automated testing -- how could they not? But today's Windows 10 is -very- reliable.
It's filled with enough annoyances for me to be frustrating at times.
The night light is awful and blasts you with full blue light whenever monitors come out of standby mode and then it'll be "On" but not actually on until you toggle it.
Lately explorer hasn't been refreshing properly, so when I create a new folder I need to right-click, refresh before I see it and can rename it.
Things that auto-install drive me crazy. No, I don't want to "Meet Now".
Every SAC update tries to trick me into enabling OneDrive "backup" (sync is NOT a backup) and I missed it once so all my stuff got uploaded to OneDrive.
BitLocker with a PIN and Windows Update don't seem to know each other exist. Updates auto-restart the computer and then it sits at the BitLocker screen or, in my case, reboots continuously every few minutes spinning the fans up to max on every reboot.
I'm sure there's more, but those are the ones that annoy me daily.