Is JSONP obsolete?

Is JSONP obsolete?

With various methods to get around the same-origin policy, such as CORS
(if you have access to the server hosting the files), or by using parsing
methods such as the getJSON method in jQuery, does JSONP ever now need to
be used?
(I actually struggled for a long time to get my head round JSONP anyway -
I don't think it helped that some sites seemed to overlook it - for
example, the Google Map developer docs state that they return data as
JSON, but make no mention of the Same Origin Policy - is this naïve of
them for assuming most people know of the issues and can get round of it,
or naïve of me for getting too bogged down with trying to understand the
technical differences between JSON and JSONP?)