uuuuuh, PS5 has more backwards compatible games (4000+) Vs at most Xbox's 3197, and while Microsoft is investing MORE in GamePass, you can't pretend Sony doesn't also have something similar with PSNow (and with the PS+ Collection being a part of PS+). They're not the same, as we've established, but they're similar enough that you can't really pretend Sony isn't trying or that Microsoft is pulling way ahead or something.
With BC it’s arguable having more gens BC is stronger then more games within the same gen they share BC.
But Sony technically isn’t trying with Ps Now and GP is in fact pulling ahead. 2 million after 6 years to GP 15 million after 3 years. And it’s not about most titles, it’s about more new/recent titles.