Here is a hot take: to say "anything you can run in a container, you can just run on bare metal"² is the same "get good" fallacy as "you can write secure code in C". Yes, you can do it in theory, just as you can theoretically write your own large scale CI system in Bash¹, and both are about as good an idea in practice. Unix never developed the high level APIs that would make containers unnecessary in practice.

¹ iankduncan.com/engineering/202
² hachyderm.io/@budududuroiu/116

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