On 2018-10-30 at 11:53:18 +0000, Matthew Pickering wrote: [...]
A compelling argument to move to gitlab is the possibility of tighter integration between the patches and tickets.
You don't need to move to GitLab to achieve that, do you? In fact, we had this project where somebody invested quite a lot of time & effort to implement a proof of concept for migrating Trac tickets into Phabricator which you might remember; it was generally well received but afaik this was silently forgotten about and so the ball was dropped in pushing it further: https://mail.haskell.org/pipermail/ghc-devs/2016-December/013444.html I'd much rather sacrifice Trac's benefits by consolidating Trac tickets into Phabricator (if the tighter integration between code-review & ticketing is the main compelling argument) than to give up on both, Phabricator *and* Trac.