Sure, sorry if I came off like I was using you guys as a political football or something. Obviously the particular bug tracker that's right for any one project is going to depend on team familiarity and experience. The main point I was trying to get across—which I think is being ignored by the dear github people—was actually what you said in your last paragraph:
> We do have to spend a lot of effort on triage, but that's true of any bug tracker
It seems like people are looking for a magical way to get out of doing triage, dealing with bad issues, and moderating comment threads. It just isn't something that's going to happen. Bugzilla has voting, for example, but "me too" comments are still a problem on bugs that get shared outside of the community[1], to the point where they're the first rule on the first section of the Bugzilla etiquette page.
Now, I'm not saying github implementing voting would be useless, or a bad idea. I'm just saying it isn't going to fix as many things as people seem to think it will.
[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=923590 was shared in a bunch of different places, and there were a lot of +1 and "me too" comments.