Yes it's interesting if this is cited as one of the motivations. That's a problem of a language being oriented around a single implementation. Is it even defin

Yes it's interesting if this is cited as one of the motivations. That's a problem of a language being oriented around a single implementation. Is it even defined by this implementation? Compare to eg. C or C++. Diversity, and interoperability is important as it is a significant contributor to longevity. I do like that you've used the term "API" as I think that sums it up. To think of "Python" not as a language agreed by multiple implementors, the behaviour here is that of a "library" with an "API".