> Before a year had gone by, almost all the major news sites had updated their pages with JavaScript intended to either block iframing altogether, or to “break out” of the iframe, redirecting the viewer to their actual page. We even got a few nasty letters and emails about it with terms like “litigation” casually thrown in.

Web feature: works as intended, allowing aggregation and republishing

Businesses/lawyers: we hate that, shut it down!

> Fast forward a few years and imagine my dismay when I see Google Amp doing essentially the same thing

Google has the deep pockets to defend itself against spurious lawsuits.