in reply to Roll Call - How new is your Perl?
We just recently finished a major upgrade at work and so we moved from Perl 5.8.8 (IIRC) to 5.10.1. That's how long the upgrade took.
Not that I found lack of // or 'state' to be much of a problem. || is often a better choice than // and the few cases when I wanted //, the work-around is hardly onerous. Even though we could now start using 'state', we just use 'our' instead (because it eases certain types of unit tests).
I still have no clue what the point of Modern::Perl is.