Book: Stick and Rudder

I'm nearly finished reading Stick and Rudder by Wolfgang Langewiesche.
Although it's mostly about powered flight, it does a great job of explaining
how airframes and controls and maneuvers work. It's firmed up a bunch of
things I'd been observing and speculating about.

But I'm wondering... it was published in 1944 and updated in 1972. Any of
you experienced pilots who are familiar with this book... is there anything
that has been disproven or drastically changed since then?

Thanks in advance,
Roger Worden
Orange CA