but seriously, who is using ubuntu, debian or even fedora for containers? Yes, there are many pre-fabricated containers on the docker hub, done by amateurs that have no clue about real world computing, but everybody can post there and docker does not do any checks on the material posted there, as a result the docker hub is a worse place than wordpress plugins, it is 90% crap and has no relevance to real work. Nobody in a real work scenario with some minimal skills and security requirements will use a container made by some random guy found on a public hub, and certainly you will not build your ultra-slim microservice infrastructure with some bloat-distro like ubuntu oder redhat. OTOH for private usage this is no problem either, so this is a non-issue.