If that's the case, and she is retired, I hope the great high school-to pro experiment is now concluded.
What did we learn? The chances of finding success going straight to pro are likely the same if not worse than going to the NCAA. At least with the NCAA you can be a part of a team and have a fun and whole college experience. So choose the NCAA and make sure it's a good team and a healthy environment.
No hate on Alexa. Just never understood why she turned pro as a senior in high school. She was the best HS runner at the time, sure, but she seemed to like her teammates and coaches. She gave up her final year with them to find herself in no man's land as a pro because as good as she was as an HSer, she still wasn't globally competitive.
People sort of followed Mary's footsteps because they saw how much she improved after just one year. Now that we have more years to follow, we kind of know that this doesn't work very well in the long run. Mary was definitely mistreated (some would say abused) by Salazar. But it is ALSO true that Mary wasn't emotionally mature enough to be a pro athlete yet (who is as a teenager?!).
I wonder how things would have shaped up if both chose healthy collegiate environments to compete in rather than turn pro right away. Maybe the exact same. Maybe different. Jordan was a collegiate athlete and look how things turned out for her. But at least she ran 2:20.