This is pretty funny
Even Adobe says you should be using HTML5 video on your sites. Haha, I mean now that it's finally matured, of course. It was designed to replace flash.
What no one seems to realize is that flash was once one of the most installed techs on the planet. The whole internet used it. It would have been horrific for the web and the company for them to abandon it immediately. Even google acknowledges, with this statement, that there was so much flash content that it should be "phased" out so that companies, content providers and their audiences have time to adjust the user experience. There's also a ramp up of skill sets required for developers to transition completely to the new tech.
It's also hilarious that in 2016 people are still angry enough to want to 'kill' Flash. hahahaha. Fanboys.