I'm of the opinion that people don't really care. (I'm also of the opinion that free software isn't the amazing development model everyone claims it is...SKIP... Sure pircd is a neat little toy, but it seems to be one that noone cares to help improve it.
I do agree with Eric S. Raymond here, who said: "And this brings us to the first lesson: 1. Every good work of software starts by scratching a developer's personal itch." (The Cathedral and the Bazaar)
If you think about it, how many people do actually have a need in developing an IRC server in Perl? Firstly, there are not that many people that need an IRC daemon in the first place. Then, this number decreases with those who are satisfied by existing solutions. Further less with those people who don't know Perl or are cut off the development for any other reason. With all these in mind, it's actually surprising that there are any "Re:" subjects in that mailing list. :)