The missing feature is the ability to run on multiple servers. I want to be able to put it behind a load balancer. Kamal also has a huge issue where you can't set the "default host". This means load balancers can't work as "/up" never succeeds. I created an issue on github but the big honcho closed it without reading lol I understand the idea behind single server, but realistically you need at least two app servers to switch over when needed.