Friends don't let friends use AMP. AMP pages aren't really "85% faster", they just are preloaded by Google, in exchange for letting Google hijack page navigation and serve content from their own domain, and this "benefit" only works if you're using Google Search to get there.

Back in September Google started taking steps to distance themselves from AMP. They even adopted a new governance model so that it's less about 'them' and more about speeding up the web in general. There's also the option to use alternatives to Google's AMP Cache, but folks tend to use Google's since it's already readily available.