Rexx was incredibly useful as a scripting language on the VM and MVS mainframe environments. It was a huge step up from the "EXEC" language. I wrote a gopher/ht

Rexx was incredibly useful as a scripting language on the VM and MVS mainframe environments. It was a huge step up from the "EXEC" language. I wrote a gopher/http server in it circa 1992 (never saw the light of day outside of IBM). There was an internal version of WebExplorer (OS/2 web browser) that used it as a scripting language in 1995 (also never saw the light of day outside IBM). My biggest complaint would be that it didn’t have a consistent way of invoking external programs or libraries. Perl won out for CGI and web scripting inside IBM over Rexx from a lack of libraries and some weird performance issue on AIX I no longer recall.