What people fail to realize is that userbase is still a huge differentiating factor between consoles. Sony is on top this gen and gained a massive userbase by making all the right moves while the competition didn't.
And now Microsoft comes knocking for the privilege of tapping into that huge userbase Sony had cultivated, with Phil Spencer carrying a transparent banner of sudden proconsumerism, well I guess I can see why Sony is hesitant. They are running a business after all.
That said, I still think Sony should just open up the floodgates as a goodwill move. Knowing full well that Nintendo and Microsoft will be profiting off that decision and in extension, their own work. Simply because the (faux) outrage shows no sign of dying down anytime soon.