Hi all, great report. Part of this is just luck/flukes. For Stanford, as others noted, in the recruiting classes a few years farther back, we had Taylor Rooks (top 20 recruit) transfer to Harvard after her frosh season, Kailee Johnson (top 20 recruit) quit basketball with a year remaining, and Lili sit out a year and then grad transfer to ND. Note that the last one seemed to be due to some friction between her/her family's expectations of how she should be used vs. how the coaches wanted to use her. (The full story was never made public, but apparently she had a helicopter parent who became dissatisfied with the Stanford coaches.)
In her ESPN interview, Haley Jones spoke about the sisterhood she feels with the Stanford players as one of the big reasons for her choice - a lot of the credit for that is due to the example that our 16-17 senior class set (Erica McCall, Karlie Samuelson, and Bri Roberson). Prior to their senior season, the team was not as cohesive and lacked obvious charismatic leaders, and those transfers/early retirements in part reflected that. Both their class and our 2018 graduating class of Brittany McPhee and Kaylee Johnson were outstanding leaders and set a really great tone for the program. Kaylee Johnson in particular is someone I could see being a senator one day. I think we're now reaping the benefits of that from with our recruiting commitments, and I think they deserve some credit for it.
All of which is to say, so many things go into why a program does or does not retain 100% of its recruits, but part of it is definitely team cohesion. Much more enjoyable to warm the bench when you like who you're sitting next to!