After twenty-five years, XMPP (Extensible Messaging and Presence Protocol) is still here. Mature, proven, modular, and standardized, it may well be the most solid foundation available today to build the future of messaging.And now, XMPP is more relevant than ever: its resurgence is driven by European digital sovereignty efforts, renewed focus on interoperability, and the growing need for long-term, vendor-independent infrastructure.Against this backdrop, the recent funding round around XMTP (Ext...