&gt; Sure, I&#x27;d love browser improvements too, but at the end of the day, you can&#x27;t automatically optimize everything from the browser. The browser can&#x27;t magically fix a 1MB JS file in &lt;head&gt;, or serving 2000px wide images to iPhones.<p>Sure, I agree that many of the optimizations suggested are good practice.<p>(Note, though, that serving 2000px wide images to iPhones <i>is</i> fixable in the browser, with downscale on decode.) :)<p>&gt; A cynical answer is that Google released this because web authors haven&#x27;t done a good enough job making fast pages.<p>It&#x27;s not cynical—that&#x27;s the exact motivation of AMP. My point is that it cuts both ways: we need to keep improving the browser, as there are still massive opportunities for performance improvements.