In what circumstances could...
use $^V;
...possibly be useful?! You really want a script that imports 5.16 features when it's run under Perl 5.16, and 5.14 features when it's run under Perl 5.14?
The new features in Perl 5.16 are 'unicode_eval', 'evalbytes', 'current_sub', and 'fc'. Does your script use those features?
Yes: then use v5.14 is not sufficient, so use $^V is not sufficient when run under Perl 5.14. So you should explicitly write use v5.16. No: then use v5.16 would be overkill, so use $^V is overkill when run under Perl 5.16. So you should explicitly write use v5.14.
use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name
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