I've been running off the back of a popular hosted forum, without mentioning the specific host..It's also used by the likes of Netflix, Mozilla and Webtrends. All I can say is they must have a ton of VC cash to advertise everywhere as the actual framework behind it is terrible.. It's mostly window dressing. Anyway I digress...If I stop paying this host (USD 1,200 p.a.) they will flick the switch and dump my forum into the recycle bin, which is fine, that's the deal!
Since finding Discourse, I'm ready to write off the collective wisdom in those several thousand posts and start again. It will be painful but I hate paying all that money for a sub-standard system, an army of customer support drones and glacial rates of change.