I somewhat share Nathaniel's worry that by providing `__numpy_implementation__` we essentially get stuck with the implementations we have currently, rather than having the hoped-for freedom to remove all the `np.asarray` coercion. In that respect, an advantage of using `_wrapped` is that it is clearly a private method, so anybody is automatically forewarned that this can change.

In principle, ndarray.__array_function__ would be more logical, but as noted in the PR, the problem is that it is non-trivial for a regular __array_function__ implementation to coerce all the arguments to ndarray itself.

Which suggests that perhaps what is missing is a general routine that does that, i.e., that re-uses the dispatcher.

-- Marten