The thing I hate most about Apple's updates is that if you say "try again in an hour", rather than prompting you if you want to update again, it just starts the update!
My PB is supplied by my employer, so I'm using it all the time in the daytime. Sometimes I have time to do the update, but sometimes I don't - but I might anticipate that I can come to a stopping point in an hour or two. But I don't get that option. If I say "wait an hour" - it will just start the update in an hour - killing my browser and tabs, my IDE, my terminal sessions, whatever else I have open...
Hosed isn't the right word for it - fortunately IntelliJ allows me to continue where I left off, and getting my tabs back is no problem in most browsers. Terminal sessions are jacked, though. And just getting back to where you were mindset-wise - that's a major pain (it's one thing when it's on your terms, but when the rug is yanked out from under you, it becomes a real problem).
Ubuntu (and probably other Debian-based Linux systems - and maybe all of them - so many distros I haven't tried or haven't played with in a long while - sigh) does it right - if you say to try again later, it will pop up the same dialog later. Most security updates aren't of the nature that waiting an hour or a day is going to be a major issue (and if it were, we generally are informed well ahead of time of it).
So - I can understand and feel everyone's pain on this; Apple really should change this to allow user choice. Heck - I'd also love options to install "at next shutdown", "at next powerup", and "at a set time/day" - because at the end of the day, when I shutdown my machine, that would actually be the best time to do the install/update (for me at least).
> Terminal sessions are jacked, though.
Interestingly, I protect against this by running iTerm, which asks me before quitting and prevents the shutdown.
> Terminal sessions are jacked, though
Tmux might be useful for that.
I was going to recommend `tmux` as well. It won't help for _local_ terminal sessions but running `tmux` on any remote hosts has saved my bacon more times than I can count.