I think they're a huge stinker.

About six months ago I was going to write a piece for www.perl.com about how pseudo-hashes had been a mistake. But I couldn't finish it because there was too much to say. Just when I thought the end was in sight (and it would still have been a long article) I mentioned it to Damian and he sent me a list of about six big problems I hadn't even thought of.

In Perl 6, people will be able to plug in a new hash implementation that behaves like a pseudo-hash, if they want to, and then the rest of us won't have to suffer.