That's okay for the base OS that doesn't change all that often. However, that falls apart when you start trying to have lots of "toolbox"/"containers"/"docker"

That's okay for the base OS that doesn't change all that often. However, that falls apart when you start trying to have lots of "toolbox"/"containers"/"docker" things that people want to use for development. The DNFs you need inside the container pile up very quickly when trying to do development. Those want to be deduplicated between containers. There is a reason why Nix gets grief about how large its store becomes. In addition, lots of people also want to containerize their working/home directory. That requires really good overlay support, and nobody has this right now. There are LOTS of issues filed against "toolbox" for this, for example: https://github.com/containers/toolbox/issues/183 https://github.com/containers/toolbox/issues/183 https://github.com/containers/toolbox/issues/348 https://github.com/containers/toolbox/issues/348 https://github.com/containers/toolbox/issues/1470 https://github.com/containers/toolbox/issues/1470 This is something that should be straightforward to implement. However, because the filesystem support sucks, it is not.