That's the sending protocol (and I've seen those changes, I reversed that, too), but I meant the changes to the receiving protocol.

There's a separate protocol app → Google and Google → Chromecast. Or at least, there was, after countless changes, I gave up attempting to build a raspberry pi with chromecast support.

And of course, Chromecast replaced the dlna protocols and Miracast support in Android. I lost the ability to stream the screen on my nexus devices to open source receivers back then, because Google had to go proprietary.