If the tabs are remotely organized (by window), and you use a plugin to change the title of the window (it shows up with a title then in window managers), it's pretty much an instant on and context switch if you need to switch between projects, and leave them in a good stopping point, and can pick them up instantly from where you left off.

I often have used separate browsers for this. One for each project, one for personal, etc. Can work well too.