I myself have no problem with the Perl/PHP debate, as it wont really affect me other than in the good way... I am still using the perl version, but just because I havent had time to switch and upgrade yet (still on version 5.2).
But, I would suggest, in view of those who will not be able to run the php version (surprised there are still hosting companies that provide perl but not php...) that though development of the Perl version not be continued... there still be bug fixes. I think it would be a correct thing to do, to though not adding features, fix all bugs that are discovered... I think by doing so you could feel more at peace in saying goodbye to the Perl version.