These days I believe very much in identifying and serving a specific set of users. XMPP is just a protocol, it has lots of potential applications, but it's nothing unless you channel that into a tangible usable product for real people.
This epiphany came to me after more than 10 years of working on XMPP as a server developer and spending time promoting open communication protocols to people. It was soul-crushing that at the end of a day I would still see my own family communicating with each other via WhatsApp.
Six months after the initial Snikket prototypes, and after a little user testing, I migrated my family over to XMPP by sending a simple invitation link (the start of the Snikket onboarding journey). They're now using it daily and totally happy with it. I'm beginning to hear similar stories from others who have repeated this with their own families/groups and their own Snikket setups.
All it took was to look at the issue through the eyes of "normal people" for a moment, and it changed my approach (and success rate) significantly.