Why quit the app vs set your status to busy/DND?
spotlight and a fast machine make it a few keystrokes to come back.
I have been on this agenda of simplifying my computing over the last couple of years and it has really made a difference. I don't need a special app for TODOs. I don't need yet another status bar agent pestering me to update itself. I don't need an IM client begging for my attention. We are builders and problem solvers, and we are paid to think really hard. Our computers and phones are devices that have a default mode that guides us toward content consumption and a bunch of "least bad" technologies.