An annoying fact of modern inter-personal messaging is that there are many methods. A glance at any smartphone may show many apps for messaging, video conferencing or teleconferencing such as Allo, Duo & Meet (from Google), Messenger & WhatsApp (from Facebook), Signal, Cisco WebEx, built-in Dialer & SMS text messaging, Zoom, Skype, LinkedIn, LINE, Twitter, Facetime, Messages & Facetime (from Apple), GoToMeeting, WeChat (prominent in China), and Join.me. Plus, there are many many more.
Extending to the desktop, we might find SIP softphones such as Bria, RingCentral and cousins of the above apps that allow for multi-endpoint logins. These apps provide voice, screen sharing, and text messaging but in this blog, we're talking about the need for universal messaging.
Thus, if you want to send a quick note to someone, it’s hard to figure out what to use. Many young people don’t use voice calls anymore, so they resort to messaging. Phones do a reasonable job of associating contacts with different platforms, but you never know if they are properly logged-in to a particular system. So, messages will fail to get delivered, or auto-converted to emails that get delivered later.