Discourse is one of the best pieces of software I've ever used — I self-host, and it's never given me any problems. There's built-in backups to S3, I can upgrade the software 80% of the time from a web interface (even on my phone), and the community and moderation features are incredibly well thought out. So much so that if you take the time to slowly go through all the options in the admin panels, you'd realise that the team has thought through 90% of all community interaction models.<p>I'm looking forward to trying Discourse chat — if the level of engineering and thoughtfulness is the same as the rest of the feature-set, it'll be a great addition to my community.