They're discontinuing video calls in Hangouts, pretty sure their video calling thing is Allo Duo (guess Allo either got renamed or got the Google curse) now, and maybe like 35 other google projects that go nowhere. Honestly that's probably why it didn't get adopted, one of the main things companies look for is long term support, and outside of gsuite, android, and the search engine, very few of their products go too long before being discontinued.