[user5994461]

0. That doesn't explain anything about what's happening underneath. It's far from enough to even form a mental model about Docker operations.

1. The stateless & The ephemeralness & The tooling. It all goes together. Just because its not enforced all the time at every level doesn't mean that it's a good idea to diverge from it.

2. What about the networking? the DNS magic? the storage? the filesystems? the lifecycle of data across containers & images and containers & further containers? the log management? the logging drivers? It would take multiple books to cover these topics.

3. Again the filesystem and storage issue should cover an entire book. There are many blog posts and issues talking about that. ZFS only became available very recently and exclusively to Ubuntu, it's ridiculous to consider that as a real world scenario.

Docker equals stateleness. That's the only thing it's supposed to do and could do well. Maybe you should consider focusing on one use case that Docker does well (i.e. packaging & deploying stateless applications). That would make up for better documentations and explanations and goals ;)

(IMO. After reading your comments, it seems that you have no clue whatsoever about systems internals [or maybe we just don't communicate well on that]. That's scary if Docker itself doesn't have a clue about what it is nor what it should be.)