Yes, in 13+ years I've not seen it change, except for the addition of sharedir

Also, see http://perl5.git.perl.org/perl.git/history/HEAD:/lib/blib.pm and http://perl5.git.perl.org/perl.git/blobdiff/49624702b850ce75f102fc7902be1ca451941985..HEAD:/lib/blib.pm, it hasn't changed much since 1996