Generally I’ve noticed more bugs on High Sierra than on previous OSX releases. Things ranging from UI glitches to freezing safari to random slowdowns - all across multiple different machines.
Coupled with the security issues it’s clear that whoever is responsible for Q&A these days is asleep at the wheel.
It’s the reliability of the hardware and software that brought me to Apple back in the days of the G4.
Ironic that I may have to switch back to Windows since my work machine seems less buggier than my Mac!