The year John Stockton turned 40, he averaged 13 points, 8 assists, 2 steals, and went to the NBA Finals.
In Jason Kidd's last year as a starter (37-38), he averaged 8 points (career average was just 12), 8 assists and 1.7 steals.
In Steve Nash's last year as a starter, he averaged 12.5 points and 10.7 assists.
So a guy with career averages of 19 points, 10.5 assists and 2.3 steals, who isn't a Westbrook/Rose type player who relies on athleticism, should have no trouble being a strong contributor even as he moves into his late 30s toward the end of this.
8 times All NBA. 9 times All Defense, including First team all defense the last 6 years.
9th in the league in PER, ahead of Steph, Wall, KAT, Boogie, Giannis, DeRozan, Butler, Lillard and others.
He shot the same percentage from 3 as Steph, on 2 full makes per game.
The best 2-way point guard in the game (ever?) and the league's best floor general.
Give me Chris Paul.