I think the egg thing has been really beaten up since my 1st year as a Food Chemist in late 1964. I have seen the pendulum swing from good for you to bad for you, probably a dozen times. Behind every change was a research paper and someone was making money.
So if you are worried about Choline in Eggs--->then start worrying about Choline in the following:
You know they are making foods from Algae, and other Plant substances to replace our Burgers, and Chicken Patties. I remember when surimi was the hot replacement. My lab made Surimi Hot Dogs--we showed them at a Technology Show in 1985--and the word got around that we were providing the best tasting hot dogs for free. Little did they know they ate fish! We gave out thousands!