The assistants are great , but it’s a two edged sword for them career wise. Their opportunities for a head coaching job become extremely limited as there making as much as most D1 coached .The jobs that pay more are typically going to someone with head coaching experience ( enough wins and that obstacle lessens) conversely the schools that will normally take a chance on an assistant would be a pay cut . Pllus these guys don’t want to go to a career ending job .If you think coaching is difficult in the portal era ,which it’s not for programs on top , try being a program with limited resources and trying to rebuild , it almost impossible. So they have far fewer opportunities to become a head coach .