Honest answer: almost not much. Except, virtualization is a big trend, since it's a hugely convenient way to package a complex thing into a black box and run i

Honest answer: almost not much. Except, virtualization is a big trend, since it's a hugely convenient way to package a complex thing into a black box and run it with minimal attack surface. If you sit back for a second, you can see that things like systemd provide nearly everything you'd want from a container, that, like, who cares is the approach you could have, for the top ten languages. If you are running a massive stack then maybe you do need Docker and VirtualBox but at this point, shouldn't you be using a staging server anyway?