Too many games means you won't be able to play them all, and by the time you get to the game, it will be on sale with a super deep discount.
I learned with backlog stacking was not wise with time/money. Now I wishlist stack and save thousands by the time I'm ready.
FOMO is the main killer. Sure, there are some select titles that get a day 1 preferential jump ahead of the pile, but for the most part, waiting until you get to it would even save on keeping a sub active indefinitely to "play all those games."