Issue with current documentation:

(The guide)[https://docs.scipy.org/doc/numpy/user/basics.dispatch.html] is older than the array interface section, and is mostly made redundant by that. However it contains a nice example of using __array__, which should be moved to the ndarray.__array__ class-method doc sting.

Idea or request for content:

I think we should reduce the 'writing custom array containers' guide to a stub referring to the other documentation mentioned above. We should not remove it since it may be referenced by third-party documentation.