That's also a good point, the reliability is solid and things won't fall apart even without a controller. That said the controller is necessary for certain nice extras like stats, guest portal, etc. Granted the average HN crowd may have other appliances or systems to manage that, and plenty of people do use a controller locally installed on a notebook purely to adopt and setup APs and then never worry about it again, but given how cheap the minimal VM needed would be or Ubiquiti's local "cloudkey" (worst name ever, has nothing to do with the cloud, it's just a stick computer dedicated for this), I think it's worth considering having a controller running if someone was going that way anyway. Might as well have the management console up all the time. My only point was that running it is highly, highly flexible.