theory vs practical
Wonder if any of the leaders of both groups actually work "at the coal face" so to speak?
I would hope they do.
The reality is, for the most part, developers have to work behind the bleeding edge for real world applications - at least for desktop websites.
So long as the client is educated and informed as to what different browsers will display, I think cause for alarm right now is ill-advised.
The trickle down has always been glacial and the standards have to appease many different interests - that's just human nature - it's *not* an easy job to corral all the camps and get agreement.
What we *don't* want is a return to the mess we had in the late nineties and early noughties. We're in a massively better place now than we were then, thanks in part to those who set the standards, but mainly to those who implement them and find workarounds - developers!
There will always be a bleeding edge - we just need to ensure it's possible to achieve that edge in production within a reasonable time frame as the edge moves forward.