Picking up a thread from a while back ...

It feels somewhat disheartening to find the action disappearing entirely from the current list display when you complete it. I'd love to have the evidence of my *finished* hard work shown at least until the end of the day. Most other to-do list systems I've tried do this, either by crossing out the entry, or by greying it out, or by ticking a checkbox. And most move it to the bottom of the page.

This would be a real motivational boost for me, and many others. (Though some might not want it, so it could be an option.)