Work meetings, whether remote or in person. 55 minutes before the start of the meeting, I'm doing the last prep of things people have failed to get to me until the last second despite having a fortnight's notice and multiple follow ups, trying to find ten minutes to go to the toilet, take a few deep breaths, sort out printer issues by myself because IT went home at their contracted finishing time, look for the refreshments trolley that somebody's nicked, scarf down some tea if I'm at home, encourage the cat to go upstairs rather than join the meeting, deal with unexpected Windows updates....
I do not have time to entertain for another three quarters of an hour, make you tea, exchange pleasantries or admit you to the meeting to stare at an empty screen or watch me drink my tea whilst DP is herding cats. And the physical room could still be in use by previous meeting staff waffling after theirs. Five emails telling me you're in the waiting room are not going to be answered if I'm not in there yet myself AND if you're there in person, chances are there's nowhere to put you where you won't be in my way.
Ten minutes early for a coffee is fine. Ten minutes to sort out connection or sound issues is fine. Five minutes early would be better, just turn up and it's perfect timing. You know, military precision - how I plan, organise and time everything to perfection with a brief period for contingencies. BUT NOT NEARLY A FUCKING HOUR EARLY.
I'll be ready, the meeting will start bang on time. Chill your boots and let me get on with what I've got to do without demanding even more of me and getting in the way beforehand.