I've talked about BPXWUNIX before but here's a nice use case: Filtering REXX query results. When I get your performance data I have code that stores it in a database which I query with (essentially) REXX.
The predicate syntax is very simplistic so I'd like to do better.
I can't replace the syntax (not entirely true but close enough) but I can filter the results better. Consider the following...
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bpxwunix
unix
grep
rexx
cut
uss