Yet another tool for containerization technology :-)

While this is interesting, the containers that I'd appreciate, are: multiple versions of programming languages & packages to be installed by each user without affecting the system globally. Every language has their own separate answer (virtualenv/venv, rbenv, node version manager etc).

Just today I struggled with "brew install python3" which complained with "Error: python 2.7.14_2 is already installed" and the only option offered was to upgrade. Whereas what I wanted was parallel installations of python 2.7 and python3. :-/

https://github.com/asdf-vm/asdf

Then, there is something wrong with either brew or MacOS or both because we can install both Python 2 and 3 in parallel on any Linux with the system package manager.