I watched again an explanation of what docker really is, it just seems to be this awesome thing that solve the very hard problem of inter-compatiblity between systems. I always tend to question how and why a developer had to use docker instead of making choice that would avoid it.

It's not surprising docker can't always work, but it's nice to see that programmers are winning. I guess future OS designers and developers will try to encourage for more inter compatibility if possible. That's really a big nerve.