For most of the world (outside silicon valley) stateless is not the typical. The typical is stateful app + stateful DB run on stateful VMs.
For most enterprises, running a stateful app with SQLite is not only possible, it's easier than running stateless apps as their entire IT infrastructure is setup to support stateful apps and it's what their sysadmins know how to do.
I have tried to deploy stateless docker container apps into a typical enterprise network and it's a nightmare. The people done understand it, are not interested in understanding it, none of the infrastructure supports it and if you want to setup something like Kubernetes then you end up in configuration hell as none of the easy to deploy standard setups actually work out of the box in an enterprise network, everything ends up needing highly customized configuration to work.
For most enterprises, running a stateful app with SQLite is not only possible, it's easier than running stateless apps as their entire IT infrastructure is setup to support stateful apps and it's what their sysadmins know how to do.
I have tried to deploy stateless docker container apps into a typical enterprise network and it's a nightmare. The people done understand it, are not interested in understanding it, none of the infrastructure supports it and if you want to setup something like Kubernetes then you end up in configuration hell as none of the easy to deploy standard setups actually work out of the box in an enterprise network, everything ends up needing highly customized configuration to work.