See it how you wish; but shell script execution was part of Jenkins from day 1, to my knowledge, over 20 years ago now. It's a 'workaround' the same way walking upstairs is a workaround for an escalator, imo.

Oh I know it! I was slighting Groovy when the old fashion way always worked just fine!

Didn’t mean to draw it out as “one of those” battles.

Cheers!