I almost thought this reminder trick was going to solve the problem. While trying it out, I stumbled quickly on the fact that reminders can only be attributed whilst using the mouse and giving not less than 4 clicks for each note that you want to sort. So as long as bulk attributing of a reminder to all these notes is not possible, this trick doesn't seem to do it.
Personally I would use the manual sort simply in a daily task management of max 10 items. In my try-out that was already way too much clicking and keeping attention on where to click.
But I hope I missed something, I'm curious :-)