Took their time but good that its finally out. Weird that its set by a game by game basis, though I guess having something is better than nothing lol. Makes for a nicer, smoother experience when there are frame drops.
I guess just look at PS4 BC on PS5. All games can benefit from the extra power automatically, and most do. Some don't.
Nevertheless, some PS4 versions of games still get patched to allow better compatability with the extra power provided by the PS5.
VRR will be the same, I feel.