I hope people doing that would take into consideration that most of the modules available from CPAN are not being maintained anymore (or just barely) and that they just keep working because of Perl excellent backward compatibility (so far).
In my particular case, I have not been using Perl for anything but very small scripts and one-liners for the last two years. I am still maintaining (what I consider) my most important modules, fixing bugs when they are reported, etc. But the day they tell me that some Perl release has broken all (or most) of them, I would probably say, so long...