Use of AMP or PWA Should Be Determined By The Needs of the Website
When deciding between implementing AMP or a PWA for your site, John recommends choosing the one most suited to your needs. For example, PWAs will be useful for websites providing interactive elements and offline accessibility, whereas AMP is great for publishing content.
A PWA is a Bigger Investment than AMP as a Solution for Improving Mobile Usability
Make Sure A Separate PWA is Canonicalised to Your Mobile Site
Google won’t get confused between your main site and separate PWA as long as you have canonicalization in place.
John Suggests Considering a PW-AMP Set up – a PWA Combined With AMP Content
Google have been looking into a PW-AMP set up, combining a PWA with AMP content. John suggests this combination is something worth looking into.