WebSockets changed wire formats multiple times before we settled on something. Last I checked, the API still isn't final, and changes in browser behavior forced a project I was on to abandon it for socket.io. Web Audio has been through at least one breaking rewrite since 2012, and still isn't finalized.
Sure, '<h1>' still gets me a big, bold heading (probably, subject to CSS), but playing a sound file without plugins is still bleeding edge, and subject to arbitrary breakage. But we've broken plugins (for the best, eventually), so the old solution to that problem no longer reliably works.
WebSockets changed wire formats multiple times before we settled on something. Last I checked, the API still isn't final, and changes in browser behavior forced a project I was on to abandon it for socket.io. Web Audio has been through at least one breaking rewrite since 2012, and still isn't finalized.
Sure, '<h1>' still gets me a big, bold heading (probably, subject to CSS), but playing a sound file without plugins is still bleeding edge, and subject to arbitrary breakage. But we've broken plugins (for the best, eventually), so the old solution to that problem no longer reliably works.