These particular email threads, when it eventually shows up in the mailing list archives, explains quite nicely why I stopped developing on Squid-3. This: This and then this.

I'm sorry guys - you first agreed on a basic roadmap and timeline for Squid-3.1 - and then in the middle of a "release candidate" release cycle you decide to add more damned features.

Considering exactly how successful previous "new features" have been in keeping the stability and performance of Squid-3 up there, I have absolutely no faith anymore in what they do.