In regards to Matrix, checkout the talk by the core dev team from FOSDEM 2019. It was posted earlier this month and covers a bit of the dilemma we’ve been sharing here wrt to ecosystem silos:
Specific times of note:
5:08 Decentralised network and Optional bridging
43:45 Latest Riot Client
As of writing, it doesn’t look like main riot site has updated the client to reflect to one demoed, but you can still test that latest build locally, or by going visiting experimental page, as posted here.