From the shadow DOM spec author: https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/ay9tVGRa8Rg/jPv0j06mP7EJ https://groups.google.com/a/chromium.or

From the shadow DOM spec author: https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/ay9tVGRa8Rg/jPv0j06mP7EJ https://groups.google.com/a/chromium.org/forum/#!msg/blink-d... There's been a lack of progress in that it's taking a while, but there are a bunch of still-open unresolved issues... The problem with big complex features. ;)