Highlights include Sliding Sync (instant login/launch/sync), Native OIDC (industry-standard authentication), Native Group VoIP (end-to-end encrypted large-scale voice & video conferencing) and Faster Joins (lazy-loading room state when your server joins a room).
@u_tamtam @pezhore It’s not like XMPP doesn’t have issues. Finding a combination of clients and servers to get a coverage of the XEPs you want is quite an exercise. MUCs are painful, especially if you want to join from multiple clients. Cross-device trust between accounts for E2EE AFAIK still requires each device to trust all the other devices manually. Matrix has many more multimedia features.