After having tried out the Matrix bridge for a while and Spaces now being properly released in the Matrix spec and starting to become available in clients, we have now bridged all the Discord rooms to Matrix rooms.
The Matrix space is accessible via #dlang:m.wfr.moe or if your Matrix client does not yet support the spaces feature you can join the individual rooms by browsing the m.wfr.moe
Room Directory.
The bridge is now also self-hosted and limited to just the D discord, so it's a lot quicker than the previous solution, although the previous solution is still in place for the existing channels and will be migrated later.