I should clarify: regardless of whether or not it is used in search "rankings", Google search results clearly consist of an AMP carousel high on the page for many searches, so it's kind of silly to argue that AMP doesn't affect "rankings", as it's patently obvious that it affects where results can show up on a search results page.

Also, FWIW, I don't have any issue with AMP as a technology, but I have a big issue with how AMP cache is used by Google.