And the company that made the best/most single player games last (this?) gen bombed horribly.
There's no definitive "proof" Sony's success with the PS4 has anything to do with single player games. Most of those exclusives don't sell well relative to the number of PS4s sold. And PS4's success this gen was cemented at a time when their sp/exclusive output was pretty mediocre.
WTF am I READING?
Are you not putting into account most of PS3's turn around was because of games like Little Big planet, Uncharted 2, God of war, Infamous, among other high profile games.
PS4 sales of even lesser games like Knack, Infamous:SS did well and then pathed the way on top of great third party support for games of the gen like Bloodborne, uncharted 4, Horizon. Even ratchet and clank was seeing it's best sales in the series history with the latest one.
And their commitment to keeping channels open are why we got Yakauza, Persona and a sequel to Garvity Rush.
All good to great games that pad out all the shooter, and online games by third party.
There commitment to staying who they are as a game company is why they are where they are. It's not just one thing. But a some of all the parts from great exclusive second party, great indie games, so far the best versions of third party games, and their dedication to creating great first party games most of them single player with optional online.