Not looking to start a flame war here, but if that's the case, then Apple's had even longer to get it right. lol. I implemented my video containers using the MDN specs which worked for both FF and Chrom(e/ium) as-is. Had to read through Apple-specific specs to figure out why Safari wouldn't render them (not autoplay but render at all).
While it's not quite "IE all over again", it's in the ballpark where I have to make special concessions to support a specific browser that is only offered on one company's platform. History may not be repeating, but it's certainly rhyming.