Unix philosophy? Have small apps that do one thing well. Face to face video calling and chatting are very different activities. I would guess that their analys

Unix philosophy? Have small apps that do one thing well. Face to face video calling and chatting are very different activities. I would guess that their analysis was that hangout does everything anyone needs and more, but people don't use it because they don't know. Also it's not as much all or nothing. If I am already using Whatsapp for chat, going to Duo for videocalling is lower friction than going to Hangouts.