On the drive home, I brought up what I see as Apatow's abandonment of style when he goes for gag or an emotion that he is deeply in love with. I ended up saying that his style is largely incidental.
A few hours later, I'm listening to him talking on Fresh Air about why movies like Tootsie are inspiring to him. He says they are both effective and non-cinematic. A much better explanation than mine.
Seems like this stuff is only important if you're completely obsessed with how creators and artifacts relate to each other. Or maybe film makers. I don't know, it has always interested me.