Yeah, none of our three Seniors were staying you cited why--I knew that. It is that there are surprising number of schools where they will have holdovers. I was talking about having that fortune, not particularly our players specifically.
Well I think different programs have different situations. For our program, no senior returning might be an anomaly this year. If situation permits, I could see a majority of our key players returning for an extra year after finishing their fourth year. Obviously, if our program can stay on top of the league and ranked in the top 25 consistently, I'd expect more of them to return.
Generally speaking, a player is more likely to stay for an extra year if
1) he/she is a key player on the team whose departure will be a significant loss and the team want him/her to stay. (example: Ashley next year fits the bill)
2) he/she loves that sport and his/her team so much that he/she would love to extend his/her college playing career. (example: U of MN senior guard Gadiva Hubbard, source
link)
3) he/she thinks there's an unfinished business and wants to help the team achieve certain goal.
(example 1: Sami Williams and Logan Schaben both returned for an extra year because their senior season was cut short by Covid. They had unfinished business and didn't want their college career to end that way. They eventually achieved their goals by leading our softball team to an NCAA tournament berth and the best finish in program history.)
4) his/her team has enjoyed so much success in the past year and he/she would love to go through the process again.
(example: so many our football players have returned for another year because they love the team and enjoy last year's success, and they believe they can complete for Big12 championship and college football playoff in the new season.)
5) the school can offer a graduate degree he/she would like to pursue while still playing;
6) the program has the financial support from the athletic department to afford extra scholarships and the head coach prefers him/her to stay.
7) if he/she wants to transition to coaching so an extra year on the team could be beneficial;
8) The incoming freshman class has his/her relative or close friend who he/she'd love to play with.
etc.
If there are multiple senior teammates who are very close to each other, one person's decision on staying or leaving could affect the decision of others. One thing I know for sure is that our three seniors were extremely close to each other. There's a possibility that they didn't make their decisions entirely on their own. Their future careers, our program's current situation, the discussion with coaching staff at the end of the season, the academic and financial support could all play a role in their final decisions.