Ben Simmons a former #1 overall pick and All-NBA selection turned 29 years old this summer. He should still be in the prime of his NBA career similar to the #3 overall pick in that same 2016 draft the Celtics' Jaylen Brown. That is not the case though and his career has turned into a huge "what could of been" story.
While Simmons is not worthy of a contract anywhere near the max that he used to get, due to his unique playmaking skills for a player his size and defensive abilities, he should still be an NBA rotation piece, but that may not be happening.