I think this is a cool hack. And I frequently use delayed messages on Google Messages to obscure my late working hours and refrain from disturbing people with a 3AM notification.
But I've thought about this a bit recently, and I don't think I should have to worry about bothering someone at 3 AM. I don't think it's unreasonable to expect other people to have do not disturb on / notifications off whenever they don't want to be disturbed.
And one cautionary tale about scheduling messages (email in particular): I once encountered a problem at 3AM and scheduled an 8AM text to tell someone about it, but they woke up at 6AM and immediately fixed it and were confused why I still had the problem two hours later (when my message arrived).
But I've thought about this a bit recently, and I don't think I should have to worry about bothering someone at 3 AM. I don't think it's unreasonable to expect other people to have do not disturb on / notifications off whenever they don't want to be disturbed.
And one cautionary tale about scheduling messages (email in particular): I once encountered a problem at 3AM and scheduled an 8AM text to tell someone about it, but they woke up at 6AM and immediately fixed it and were confused why I still had the problem two hours later (when my message arrived).