AMP pages no longer get preferential treatment in Google search
The coverage of this has, I think, been misleading. Google has not officially said (anywhere I can find) that AMP won’t get preferential treatment. They have only said that AMP won’t be required to rank. Those are very different statements. “Sure, we will include a few non amp stories,” is different from assurance that you will not be punished if you remove amp support from your site. The second one might be true— but Google hasn’t confirmed it.