Versioning of dependencies, modules, etc.

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I can only recommend watching the whole keynote from Russ Cox (Go programming language) describing how to (not) do versioning in a programming language ecosystem. It's full of real live examples underpinning the decisions made in Go.

Opening keynote: Go with Versions - GopherConSG 2018

Should Dao spread at some point way more than now, the very same concepts will be needed.