Containers are what you make of them. At the very least, they can be useful for doing code-testing (regardless of where that code is going to run). Basically:
E.g., if I have code where I would normally just say/pray "this works on <DISTRO_A> and should be portable to <DISTRO_B>", I can spin up a <DISTRO_B>-flavored container and run it in that context without having to stand up a whole VM to do so.
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