I am migrating to LinkedIn as that is similar in nature - connecting around interests - and MS have done a good job in making LI more social. Getting a nice interaction on there right now even with 100x less followers. Looks hopeful to me. Also trying other things out too like Cake and Minds.com
It's sad, because if anyone could have duked it out with Facebook, it was Google. But cest la vie. Maybe they'll all come to Cake?
My more pressing question is, how well can I migrate my audience?
When it's late in the evening and I'm deep in my cups, I'm prone to posting hip hop videos. My collection on G+ grew to about 15000 people. I'd love it if I could cleanly migrate that audience somewhere, but there's no ability to do that.
Well, I doubt I influenced anyone ... but, to answer your question, I have not migrated anywhere. There is currently not anything happening on the WWW that has captured my attention. The parts that I loved best about G+ was that it felt like you were actually meeting people, really getting to know them. Hangouts broke down the wall a bit. But, as I get older, Ill be 54 tomorrow, I find that I am narrowing down who I choose to hangout with. I'm looking inside more and not outside for influence.
Who knows, perhaps something else will come along. It'll probably pass me by and I wont notice, and that'll be ok. :)