in the last couple months. BYU is not unique in having many of their players enter the transfer portal. They are just like nearly every other school in D1. I have seen multiple references to over 2,000 players from D1 schools in the transfer portal, including the 1 below. There are just over 360 D1 teams. That is about 6 players per team. BYU has been lower in transfers than the average most years. With a coaching change this year the BYU transfer total was higher than I think it will be compared to the average.
BYU brought back players that entered the portal, so good players are coming back. I also saw that a little over 100 players returned to their original teams, so BYU was better at retaining players that tried the portal and/ or BYU is also more willing or has more need to bring back their own players that try the portal.
In a new world where teams are seldom filled with returning production, hope KYoung is the right man to lead BYU to high levels of long-term success.