in reply to
Re^2: Which takes priority site\lib or lib?
in thread Which takes priority site\lib or lib?
So they silently broke older installs
Well, old installations usually don't magically get a new perl. When installing a new major version of perl 5, it's a good idea to re-install all dependent modules anyway.
And it wasn't without warning either. To quote perl5120delta:
In @INC, ARCHLIB and PRIVLIB now occur after after the current
version's site_perl and vendor_perl. Modules installed into
site_perl>and vendor_perl will now be loaded in preference to
those installed in ARCHLIB and PRIVLIB.