It features extensive bot support. You can upload replays, new games and maps will be announced. Besides finding opponents we also moved our development channel there, so we get a better exchange with the community and open up the process further.
The project should change the Build instructions to reference that MSBuild is Free Software under the MIT license because it is referenced as propietary software (https://github.com/OpenHV/OpenHV/wiki/Build) and even their binary builds seem to be under the same license.
I asked about XBuild support because of this reference.
See also https://github.com/OpenRA/OpenRA/issues/16615 and more interestingly https://launchpad.net/~eofla/+archive/ubuntu/msbuild as a Debian package. Note that this is not yet in a quality where it could be submitted into the official repositories. When I tried to submit it to openSUSE the lawyers said it contains non-free parts though I don't exactly know which. That has to be patched out and the bootstrapping also has to be done according to Debian guidelines. It is a complicated dependency, and I am not thrilled about it, but we don't really have a choice here.