Mostly tech related communities exist right now. The experience is like a well-executed mashup of Reddit, Slack and Twitter.
Spectrum is awesome. It's like what everyone wishes social networks would be, but can never find because they are too individually centered. I have high hopes for this platform.
I have tried it and I like it, it offers many opportunities to contact people of your sector and interests.
I've been using Spectrum for the past couple of months and it's been a great way to engage with communities that I'm not only heavily involved but also casually interested in.
Definitely check it out if you haven't all ready.
Explored this product as a potential future option for our open source community. However, it was lack luster and underbaked. We currently use Slack and can't find any reason to explore Spectrum beyond my initial investigation.
I've been using Spectrum for several months now, since Alpha. The team has really taken the time to listen to what these early users have had to say and improve the platform as a whole.
I think this truly solves a big issue for those people trying to manage a community. It also makes participating in community discussions a way more intuitive and user-friendly process. One account, one inbox.