These maintenance times consistently line up with when I get in from work, and they never seem to do it at a different time to inconvenience another timezone for a change. The issues they resolve are also usually related to super niche bugs that most people didn't notice (a furniture light being tilted; an animal sanctuary pet wandering past a fence), or some minor potency tweaks; even if it's a necessary fix, it's hard not to think "eight hours for this?" when I read the notes. That said, there's so little to do right now anyway, that it doesn't even bother me at the moment. They also gave a couple of days notice iirc, so I just logged in before work to do my island stuff.

So yeah, speaking as a casual player. Do I find the maintenances annoying? Mildly. If I were in a later timezone, I probably wouldn't notice them at all though. They give enough notice to plan around them, and the game's utterly barren of casual shit to do atm anyway, so who cares.