This went under the radar. The Matrix Synapse homeserver has been moved from the
foundation to the commercial arm Element.

> Synapse is an open-source Matrix homeserver developed from 2019 through 2023
> as part of the Matrix.org Foundation. The Matrix.org Foundation is not able to
> resource maintenance of Synapse and it continues to be developed by Element;
> additionally you have the choice of other Matrix homeservers.
> – https://github.com/matrix-org/synapse

It makes sense to some degree, to not have software and protocol dev entangled,
but this gives me bad vibes from how other companies have operated in the past
ending up using the community for dev and the locking things down.