[lmm]

I don't think anyone disagrees that Go is an improvement over Javascript, or more reliable than Python. But I've been working in Scala for several years and could say the same thing about never being woken up.

Look at the examples on the page. Would you really rather see the Go one at 3AM? It's twice as long, and the superficial similarity of each if(err...) stanza obscures the important differences. On a large codebase that adds up. Maybe the "complexity" meant the Swift took longer to write (though I'd dispute that too) - but if it's more readable and more maintainable, that's a positive tradeoff.