He specifically mentioned compatibility charts, which implies he isn&#x27;t just looking at supporting the latest and greatest!<p>In my personal projects <i>I</i> don&#x27;t care about legacy browsers (to users that far out of date I say &quot;please go be a pain in the side for someone else&quot;), but professionally I&#x27;ll have to support at least as far back as IE8 for a while yet and I suspect a great many people are in the same position.