Actually, Solaris has been shipping with the most recent
version of Perl available at the time the Solaris release
was made for quite some time. And for the sake of backwards
compatibility, they ship the previous used version as well.
(That is, Solaris 10 will have the version of perl that came
with Solaris 9, plus the newest stable version of Perl the
moment Solaris 10 is made).
Abigail