- no support for background tasks, or resummoning stopped processes
- while completion was added in 0.60, it doesn't look quite as featureful as zsh completion, and of course it doesn't have as many completions written as older shells
- less common need, but I don't think there is a way to do something like `exec {myvar}>file`
- I don't think there is an equivalent of `<(command)` to pass the output of a command to another command as a file. Although that could probably be implemented as a plugin pretty easily.
I might be misunderstanding this, but piping to `save` is how you usually redirect to a file in Nu: https://www.nushell.sh/book/commands/save.html
From the bash man page:
> Each redirection that may be preceded by a file descriptor number may instead be preceded by a word of the form {varname}. In this case, for each redirection operator except >&- and <&-, the shell will allocate a file descriptor greater than or equal to 10 and assign it to varname. If &- or <&- is preceded by {varname}, the value of varname defines the file descriptor to close. If {varname} is supplied, the redirection persists beyond the scope of the command, allowing the shell programmer to manage the file descriptor himself.