I dont think he will totally remove himself until he is completely incapacitated or dies.
Stephen has had a larger role, but no doubt Jerry still makes many of the major decisions. Hiring or whether to fire coaches, swaying vote on early round draft picks, decision on resigning Dak, CD, Micah and things like signing Zeke and his playing time, etc.
Stephen may move up even more, but I dont think Jerry will relinquish key decisions like HC hires, tie-breaking vote on 1st rounders and so on until he no longer can.