v3 appears to be pre-release version? Surely that makes sense to not default to pre-release code for the docs?
> defaulting to deprecated API documentation
I am not sure what point is being made here. This seems to be splitting hairs.
Regardless, it makes sense to default to the docs for the version which is considered to be officially released. That version is probably most likely to be used in a production application, which is usually what the docs are intended to support.