[vord1080]

average disingenuous HNer making comparisons between compilers and web browsers. Everyone involved knows Shadow DOM V0 was a rush job, as was the YouTube redesign that used it (it had major perf issues even in chrome when it came out). The standardized ShadowDOM v1 is better in every way and works in all browsers. It's pretty clear that Google wanted V0 to spread as far as possible so they could force it to become a standard, as removing it would "break the web". Shadow DOM, regardless of version, isn't critical for a product like YouTube. The "web" is only the "web" if parties involved play fair, even just a bit, otherwise it's back to IE6.