would it break many programs?

Not using grep for its side effects is only a best practice, so yes, I think that people are using it for its side effects, and that it would be a breaking change in enough programs to make it unfeasible. Or, at least it would be a big enough change and break from tradition that you'd never convince P5P to make the change :-) What's wrong with List::Util?

In reply to Re: Shortcutting grep in boolean context by Anonymous Monk
in thread Shortcutting grep in boolean context by perlancar

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