Gtalk was brilliant! When they launched it my appreciation for Google grew tenfold. It was so un-enterprisey and it just worked! Shortly thereafter they fixed their offering by launching the very Enterprise-friendly Wave.

Mmmmmm, Wave. (drooling dead-eyes Homer impression).

At this point I don't even know what's their main chat/video product. Meet? Hangouts? Duo? I have all three on my phone for some reason but still end up using Zoom and Whatsapp