[zlurker]

Errors/Exceptions by value isn't that important in isolation, but it makes functional programming styles work a lot better (monads).

I think there's still an argument here that this is just a symptom of trying to force functional paradigms on python, which is happening more and more, which I like but am sometimes worried about how pythonic it is... For a one odd script it works well, but when I want to maintain something and have to manage many dependencies and onboard new devs it becomes quite challenging.