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I guess it's a bit like advanced perl5, you need to be taught the "right way" otherwise you pile up overlapping imperative code.

Thanks for the suggestion -- I expanded on this idea in a blog post:

Feedback appreciated!

You forgot rtprio, idprio, chrt, and numactl; the s6, perp, daemontools-encore, and nosh toolsets; and execline.

Then of course there are TCL and the Thompson shell.