[voidz]

Thanks to tmux, I don't have a problem with multiple interactive commands and their outputs. If I need to do something new, I open another shell on a new pane. Not that other solutions aren't welcome, but this works for me.

If I don't want output at all, the &>/dev/null output redirection works, or file descriptor redirection, for which zsh has useful methods.

Spaces in filenames are easily solved by quoting filenames or variables. Again, zsh provides a myriad of ways to make this a trivial issue.

My main point was to argue what qualifies as to being called 'shell'.

[Bjartr]

One of the problems tmux and friends don't solve that a "smarter" underlying system might add is the ability to make the choice to detach a process or redirect its output after it's already begun running.

For example, I specifically have had on many occasions started something and then later wished I'd previously started screen. While, "gain the knowledge to better configure your environment to start" is a valid response, equally valid is a desire for a more flexible default environment in general.

[dmytrish]

"Detach during running" is a problem solved from the beginning of shells: just suspend a foreground command with C-z and type `bg` to wake it up in the background.

Output redirection seems to be a valid point, though.