What I'm looking forward to/hoping for, is the open source community to reimplement Discourse's backend in other languages. Why? Well I do a shedload of PHP work, on PHP sites, where a modern forum (especially a moder AND secure forum) would be greatly welcomed. But being customers with PHP sites, on PHP infrastructure, they're not going to have a Ruby forum. Or on a subdomain, not until the SEO benefits are the same as a subfolder... Here's looking forward to a language-agnostic world, one thing .NET did get right!