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.
The article only talking about single app per server without using hostnames. That you can do as the app will respond to the IP address. Currently you can't run multiple apps on each servers behind load balancer as the health check will not be successful as there is no way to set the default host.
