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by bPspGiJT8Y 1032 days ago
I got curious and decided to google around. I din't find anything from Pike specifically, but my overall impression is that the maintainers simply refuse to see significant value in sum types. They do acknowledge the benefits but not their importance. Interestingly, the overwhelming majority of Go users (at least as indicated by this[0] GH issue) do wish for Go to have sum types. My speculation for Pike in particular though is that he's not that important to have significant influence on the evolution of Go.

[0] https://github.com/golang/go/issues/19412