I did look through it, I’m not actually sure what improvement it would be over what is already being done with dithering/TAA. It’s still dithering, which is the complaint.
12ms in a tech demo. Yes, if you want to make your entire scene into overdraw hell and want every layer to be perfectly sorted, you will have problems. There’s a reason they are tech demos and not games. This is what I was talking about with moderated usage, most of them have layer settings to prevent it from getting out of hand as well. Black Ops 3 and 4 are already using it. Tomb Raider’s Definitive Edition is using TressFX on consoles.
Restricting any kind of undithered alpha sorting to ROV capable hardware is overkill.