Sean would never be the coach for an entire season...it will only happen as the result of his old man faking a stroke or actually having a stroke.
Curries isn't stupid, and as such will never allow Sean's "tenure" to last more than the remainder of the season in which he relieves his old man.
So, I won't be too upset when Sean takes over...I'll be focused on tracking where the university jet is heading off to next.