I do have The Athletic, and read it before I made the post on his transfer. Bordreaux does not really say, but implies the uncertainty of success of the X program moving forward pushed him to a better Purdue team, and the guy who recruited him when he signed with X. These kids want instant success, not success for their school after they graduate.
Interesting that he said that Mack called him, and worked hard to get him to Louisville, but he felt his playing time was blocked there by two great forwards. Mack is further scum for making that call.