> now you have to install the right version of Docker on all your servers. No, you don't. You might not even have to install Docker, e.g. Podman will probably

> now you have to install the right version of Docker on all your servers. No, you don't. You might not even have to install Docker, e.g. Podman will probably do just fine. "All" docker is doing is calling some kernel code to set up namespaces, etc. With very few exceptions the only thing you might have to worry about is the kernel version, but given Linux's historical compatibility story there and the fact that the JVM doesn't really rely on any esoteric kernel features, you'll also be fine there. With the JVM the changes around modularization from 8->11 were hugely distruptive such that you couldn't just run any old 8 program on 11, so you couldn't upgrade the JVM unless all the JVM-based stuff running on the server was upgraded in one go, etc. etc.