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Virtualbox working with Hyper-V: more freedom with Docker!
A major problem in virtualization on MS Windows machine was the incompatibility between Oracle Virtualbox and MS Hyper-V.
They refused to work together.
I used to run Docker in an Ubuntu Virtualbox VM, for instance.
And I did not want to spend any time for a similar installation in Hyper-V.
And Docker on Windows, through the MS WSL (Windows Subsystem for Linux) or through the older Docker Toolbox, was not easy to use