>They do offer introspection and as for "structured pipelines"... this is only important if you want to pretend you are replacing "shell proper".
Please show me how I can tab-complete SQL queries in any elisp shell. I'd like to be able to at least complete all table names in all contexts.
PowerShell is freakingly powerful in that regard - I already use it instead of psql shell to work with Postgres databases. Mostly because autocompletion in posh based on simple introspection is miles ahead of what's present in psql.
And that says something.
>If you don't like LISP Machines analogue then I have another for you: Space Shuttle
Yup. It's funny because bash is very much like Space Shuttle: it's old, it's expensive to use (bash hell scripts are not easy to write), it's prone to crashes, etc. The only reason it's used is because of a sunken costs of tons of hell scripts.