I selected “was” simply because I don’t have enough understanding of the current situation to argue it from that standpoint.
In many ways, Chromecast is superior. Removing the rendering task from the tablet or phone, and letting the receiver manage that, it’s significantly better than making the mobile device decompress the source stream and then decompress it for a Miracast receiver. The only real advantage Miracast has in this is that it doesn’t need to receive firmware updates to keep it up to date with newer protocols. With Miracast being built in to TVs, and possibly implemented in an ASIC, it should be a universal fallback. With Android 4.2 it was a built in protocol to AOSP. What I didn’t know was that it was actually stripped back out with Android 6. I thought dropping support was specific to Google devices only.
What really needs to be implemented is a non-proprietary extension to Miracast which goes back to the early Chromecast days when it was based on the DIAL protocol. It’s incredible that we have to deal with so many proprietary standards from Airplay and Chromecast, and then also support the wifi alliance standard for Miracast.