Not to rain on his parade too much, but a lot (most?) of his &quot;Five years ago...&quot; statements just aren&#x27;t true.  Most of the ideas he says didn&#x27;t exist or where &quot;heretical&quot; five years ago were definitely around.  More of them would be true if he said 15 years ago, but even then a few of them weren&#x27;t new ideas.<p>Or maybe he implicitly meant &quot;... at Etsy.&quot; in which case he may be 100% correct.