> And this also uses awk and jq, which are not just simple "one purpose" tools, but pretty much complete programming languages

In a way that exactly illustrates the GGP's point: why learn a new language (nushell's) when you can learn awk or jq, which are arguably more generally- and widely-applicable than nushell. Or if awk and jq are too esoteric, you could even pipe the output of `find` into the python or ruby interpreters (one of which you may already know, and are much more generally applicable than nushell, awk, or jq), with a short in-line script on the command line.