There's also the longstanding option dtach, which similarly seems to be a lightweight re-attachable way to run a program. https://github.com/crigler/dtach
For a while I was running neovim on dtach, which let me host all the terminals I might want. It has long felt weird that we have so recursively many layers of management and navigation: the OS juggling multiple terminals, tmux juggling multiple shells, and neovim juggling multiple windows. I was doing pretty good in full screen neovim for a while, but have backed down a bit, still find tmux navigation a bit faster.
IIUC, the main difference is that shpool maintains an in-memory copy of terminal state that it can use to re-draw after a reconnect, so you don't lose all your scrollback.
dtach, abduco, and diss are all mentioned in comparison at the bottom of the page. I've never used diss before, but the other two are good products, but for some reason the ergonomics never quite seem to work out for me and I revert back to tmux.
Similarly dvtm, which is a minimalist version of the window management aspects of tmux but omits the session management, also never quite seems to click for me.
> It has long felt weird that we have so recursively many layers of management and navigation: the OS juggling multiple terminals, tmux juggling multiple shells, and neovim juggling multiple windows
Tbh that's why I'm not a fan of tmux or terminals with fancy internal window management. I suppose it makes sense if your OS level window management is crap (macos...) but otherwise it feels like poor solution
For a while I was running neovim on dtach, which let me host all the terminals I might want. It has long felt weird that we have so recursively many layers of management and navigation: the OS juggling multiple terminals, tmux juggling multiple shells, and neovim juggling multiple windows. I was doing pretty good in full screen neovim for a while, but have backed down a bit, still find tmux navigation a bit faster.