Thanks for the kind words and for sharing what happened, crucial.
I wondered about this awhile back too. One of the reasons is a human one: Concierge, as many estates as they help out with, need their Rest&Relaxation on the weekends, as do Lindens in general.
It unfortunately sets a dangerous precedent if every private island owner could request a weekend rollback due to "user error", a term which sounds unfriendly to me but is common enough to be practical. And while your circumstances, by your account, sound
simple--which is nice!--more often than not, there are further complications involved. I wish I could say it was easy as clicking an Undo button, but there are myriad intricacies involved with the data recovery that happens during a rollback process. But we want to make that as headache-free as possible.
Obviously, we know that if there are serious problems originating from the system, it will be duly dealt with ASAP. A Gridmonkey is carefully on the watch 'round the clock for these.
Now, this is the way it exists today, and as SL grows in the future, we'll reexamine it. Just like Liaisons didn't always used to be 24/7.
So, it isn't meant to inconvenience you, but rather, assure that time and care will be taken instead of fatigue clouding judgments. As a rollback is a serious operation, we would not want to compound mistakes.
Sorry to make you wait in the meantime, thank you for your patience, and all the best with this.
