OP is complaining about Safari not supporting the most recent APIs, whereas AMP supports only an extremely limited subset of all those technologies.
But I believe the larger issue is how it makes URL meaningless, and futures a centralisation of the web. It's not against the standard, but certainly the spirit of the web as it was supposed to be.
But I believe the larger issue is how it makes URL meaningless, and futures a centralisation of the web. It's not against the standard, but certainly the spirit of the web as it was supposed to be.