Sony didn't have cross-gen 1st party? TLOU had a PS4 remaster a year or so after the PS3 release, that counts as a cross-gen game. Many third-parties had them as well. And I already said how them not having cross-gen for a lot of 1st party games kind of was a bad move as a general consensus early on, up until around Bloodborne's release. Outside of Infamous: Second Son, their 1st party titles on PS4 were either seen as average or in some cases, poor (Order 1886).
Even before the system released, many wondered why games like Gran Turismo 6 weren't at least cross-gen releases and never got cross-gen ports a year or so later on. Meanwhile PS4 exclusives they premiered at the reveal event like Dreams were way, way off (hell I basically stopped caring about that game last year when in 2013 it was one of the biggest reasons I looked forward to PS4).
Anyways, you aren't going to ever have an informed critical thought on this stuff if you only go looking for what you already want to hear. Shutting out logical points of a topic simply doesn't make any sense. I do think Booty should have simply not mentioned cross-play related plans at all right now though; anyone could've assumed cross-gen would've been a thing, but people paying attention to next-gen systems aren't really thinking about cross-gen gaming. Though it could be beneficial for multi-platform online gaming with cross-play, so that could be a reason for caring about cross-gen support I suppose.