I read that, but as a rather heavy user of tmuxinator, I wouldn't really want to have all my projects running in the background at all times. I like that with tmuxinator, I can just start up the project(s) I'm currently working on, and leave the rest idle.

I am going to try out tmux-resurrect, but it's value to me would be mostly for ad-hoc tmux sessions; I think I'll still set up dedicated tmuxinator configs for each of my longer term projects.