[dwohnitmok]

It's interesting to see a lot of FP communities independently arriving at the same architectural structures. See e.g. Haskell's "handle:" https://jaspervdj.be/posts/2018-03-08-handle-pattern.html

[seanc]

Convergent design is certainly a thing, but it's also quite possible that communities are cross-pollinating ideas. Either way, when you see those recurring patterns that's certainly a strong indicator that one should pay attention.