What people mean is Python (and others scripting languages) dependency hell. Unix dynamic linking very rarely has any issues as static typing makes it relativel

What people mean is Python (and others scripting languages) dependency hell. Unix dynamic linking very rarely has any issues as static typing makes it relatively easy to reason about stable interfaces. The raise of containers, is consequence of raise of dynamic scripting languages, and rather un-unixy and "get it ready ASAP" culture, IMO. You can have 100 daemons written in C/C++ running on one system just fine, and that's how Unix systems used to work, but as soon as you start using software written in Python, you can't get two running system-wide, without recompiling every dependency into separate `virtualenv`. So it's easier to just throw them each in their own lightweight virtual machine, based on the recipe on how to rebuild the thing.