I asked a question a couple years ago: Create session if none exists. It's got about 5K views and twentysome votes right now. Initially, there was some question as to whether it was appropriate for the site, but I argued that it was similar to asking how to use vim, and that seemed to settle it for a time.
It got closed as "off topic" recently. So either the community hasn't made up their mind about it, or they've changed their mind since I asked it. I still think tmux questions are appropriate for the site, but I'll bow to the will of the community. If I shouldn't be asking them on SO, where should I be?