Makes sense. I guess the author's contention is that if Julia had those formal features the author wants, it would need very significantly less dev time to reac

Makes sense. I guess the author's contention is that if Julia had those formal features the author wants, it would need very significantly less dev time to reach python's levels of reliability? It's of course plausible, that's what those sorts of features are intended for, but I'm not certain I'm absolutely confident. At any rate, python demonstrates it is not the only path, as the author seems to be suggesting ("it is not obvious to me the problem can be solved" without these features, says the author. But it's not obvious to me that those features are necessary to solve the problem, or sufficient to solve the problem...)