Every year or so someone brings up the prospect of moving from Trac to something else (mostly github recently). October was the last time this was brought up[0].
I'm of the opinion that Trac is probably blocking a number of people from contributing, even if that contribution is participating in comments and voting on issues.
But that's exactly the kind of thing the community as a whole can be empowered to do without the old guard of core vetoing the suggestion outright. The python community are considering doing just that now with PEP 581.
[0]https://groups.google.com/forum/#!topic/django-developers/ai... [1]https://www.python.org/dev/peps/pep-0581/
Bots that mirror content/comments between the various platforms might be an interesting interim step that could minimize those scare quotes, and achieve many of the benefits in a minimally invasive way.