I have run into at least one situation where the magic versus other deep monkying broke things. I tried to use IO::All at work a few years back and it caused problems (which at the time was too much work to debug so I just let go of the attempt). The code base is a huge mess hopelessly full of BEGIN{}s and STDIN/STDERR shenanigans so I understand IO::All was not exactly to blame but I still would avoid it today unless it’s for personal or throwaway stuff. Path::Tiny and other new tools fill the gaps for most of what I need.