Last time I checked there was the Matrix reference implementation and Riot. Today, there's a bunch of gorgeous Matrix clients that I can see people actually use. Alternative clients like Fractal and Nheko can make or break the ecosystem and I'm glad to see continuous improvement in that area.
It's especially nice to see the cross-signing proposal approved, as trying out just a few Matrix clients over time has added 9 separate keys I need to approve to my account already. Stuff like this will make it easy to switch phones/desktops/apps and will be wonderful for public uptake.