Well they are. Most devs can instantly tell if a site is flash or html5. And anyone who visits the site will know it's html5. So even if someone had any doubts

Well they are. Most devs can instantly tell if a site is flash or html5. And anyone who visits the site will know it's html5. So even if someone had any doubts earlier, they now know for sure that html5 is mainstream and flash's days on web are almost over.