Hmm. I use unnamed, unsaved tabs in Sublime Text. It's great because the unsaved documents survive the app being quit and reopened or the machine rebooted. I do end up with many tens of tabs that I have to cull every few months.

Most notes are temporary until I can absorb enough to have a good shot at finding out what it states with 15-30 minutes investigation tops. Having lots of saved notes wouldn't help me if I couldn't find what I'm thinking of quickly.