why have both the regular version string and also (plain) year as version?

The integer year lets you see how recent or old the code is at a glance, but it's not a version number. You can install the most recent M::P and write use Modern::Perl '2010'; while still requiring the most recent version.

In reply to Re: Multiple ${VERSION}s for same $VERSION by chromatic
in thread Modern::Perl version 2011 required--this is only version 1.03 at my-perl-script.cgi by taint

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