Well that is fine, but that is only covering a very small sliver of what screen/tmux are used for.

Agreed, and my problem with even the usage above is that I often realize too late that "whatever" is not going to finish before I need to unplug. Then I have to kill "whatever" and restart with nohup and logging. tmux/screen always has me covered.

Obviously I think tmux/screen is the better option, but bash's builtin 'disown' may have you covered for that specific usecase.

Thanks for the tip, I didn't know about "disown".