It is minimalist because it has to support many platforms and must be lightweight and easy to port. It also must be stable for a long time. Once something lands in the standard library, it is very hard to remove / modify / redesign. How many half-broken date time implementations Java ended up with?
But it makes up for the minimalist stdlib by making it a breeze to use third-party libraries.
But it makes up for the minimalist stdlib by making it a breeze to use third-party libraries.