> From a practical point of view when you are consuming an API, which requires more concentration? I think the current Go one requires more concentration, or a

> From a practical point of view when you are consuming an API, which requires more concentration? I think the current Go one requires more concentration, or at least more work. Lots of functions return data, err. You have to check for each of these functions if the presence of err means that data is going to be invalid/nil or add it to your code. The same argument could be made for nil by the way. Since everything can be nil, you have to check for nil often. In languages that make a difference between a type, and a type or nil, this is easier.