Rakudo (Perl6): What are the features that don’t yet work?

http://rakudo.org/status shows a list of things, but it's hard to keep it up-to-date. The biggest things are probably threading, async IO (both due to Parrot lacking them). Some things are quite there, but have bugs (like traits).

You can also listen to this interview on floss-weekly, dated October 29th, 2010:

Randal Schwartz interviewing Patrick Michaud, the current main developer of Rakudo.

I think he talks about what does not work in the latter half of the >1hr interview

http://twit.tv/floss140

The file is audio only. And it certainly does not mention ALL features that do not work, but it provides some context.