Found the technical writeup <a href="http:&#x2F;&#x2F;lists.w3.org&#x2F;Archives&#x2F;Public&#x2F;public-coremob&#x2F;2012Sep&#x2F;0021.html" rel="nofollow">http:&#x2F;&#x2F;lists.w3.org&#x2F;Archives&#x2F;Public&#x2F;public-coremob&#x2F;2012Sep&#x2F;0...</a><p>Two main issues back then were scrolling perrformance and memory constraints.<p>We&#x27;re working at image heavy microsites at lookcast and I can confirm memory issues and composition performances are still constraining what we can do on devices.