Folks, I wrote a long email, replying to each point where I agreed/differed with Ryosuke, and then deleted it, realizing I wasn't being productive.
So instead, I decided to start summarizing the contentious bits of the current Shadow DOM spec: https://github.com/w3c/webcomponents/wiki/Shadow-DOM:-Contentious-Bits We are at a point where there are hard choices to be made. But with the 4+ history of the adventure, it's nearly impossible for everyone to recall or catch up on discussions and relevant insight. With this doc, I am hoping we'll get on the same page and make way. :DG<