The thing that blows my mind is that based on the discussions, people are placing more importance over exclusivity than quality (Seeing as people across the 3 threads have been using Killzone, Ryse and AC Unity as examples lol). If the game is good I simply don't give a shit how many platforms it launches on. Comparing the last three major console releases (PS4/One/Switch), the best game to come out at launch for any of them was BotW, a cross-gen game. Beyond that, it was made on weaker hardware then the launch PS4/One and is one of my favorite games of all-time.
Just because next-gen games could feature 'new' next-gen only features doesn't mean the game is automatically better than games of the prior gen. Or are people really going to tell me that Killzone Shadowfall, Knack, Ryse and Dead Rising 3 were so much better than games from the 360/PS3 gen? Sure, they might be spectacles, but beyond that they were all fairly mediocre.
Also, if this cross-gen plan only lasts until holiday 2021, this will affect what, like ~4 games outside the launch (which was previously pointed out, are rarely anything special anyways)? If you look at Xbox first-party, they have a nice spread of AA to AAA games, and I seriously doubt the AA games in the year after launch would be pushing the new hardware so hard that it would be impossible to release a version for older consoles.
I know this is a next-gen thread so people would understandably be upset by the idea of cross-gen, but if the game is good who fucking cares where it launches. I do get the concern, I just simply have faith that the developers will make sure that all versions of the game are fun and run well :)