> Isn't it relatively likely that there are more people learning Buddhism orally now than there ever have been before?

Well I suppose if you mean listening to an audio-book or even reading a book constitutes learning something orally, then you might have a point.

When I say orally I mean passed down from generation to generation via spoken word. Buddhism originally had no scriptures and was passed down by word of mouth until everything was transcribed to texts.

Yeah, I meant orally as in spoken, not recorded.

There's an awful lot more people around now than there generally has been.