My knees do point slightly towards each other. I could never be a yoga model because I'm just not linear. Knees point in, calves bend out. Even when the knee joint is fully straightened, my legs don't look straight. It doesn't cause any knee problems when pedaling, it's just the way I am. I can consciously pull my knees out, but it takes mental energy as well as physical energy, and isn't natural.
Anyway, I ended up getting a good deal on a Specialized Vita from last year. My neck is much happier with upright bars. I will keep a basic drop bar bike for those few times I might want to do something different (or ride with a friend). I'm sure that the Vita will serve me well, just like my Sirrus did, before it was stolen.
Thanks for the interesting discussion. Besides the Wright Brothers owning a bike shop, it's fun to see how all this is connected. And I've worked in aviation for 25 years