The two current models have been out for several years, but Obihai hasn't announced any EOL dates. Obihai did announce EOL for the OBi 1xx series, which are discontinued now. It's anyone's guess as to Obihai's plans for the 200 series. My own "educated guess" is that these models will be around for several more years. They don't cost that much to purchase, so it isn't worth worrying about. They are essentially small computers with software stored on flash memory, so they can be upgraded to fix bugs or add new features. The underlying SIP VoIP technology hasn't changed dramatically in 15 years or more, and it's become such an established standard that very old ATAs (e.g. from Cisco or Linksys) are still running today.