Really even Lewis is on or near the back 9 of his career. We have a few more years of prime Lewis Hamilton and then we will be talking about the end of his career. Time moves on as will Kimi at this point.
The future of F1 is Verstappen, LeClerc and the like. LeClerc is looking promising and I think it a good move by Ferrari to move him up. They have a super star in Vettel and this gives them a driver to develop.
I am not sure Lance Stroll is part of that future yet. We will see how far he goes. Right now he feels like just another mid pack driver vs a super star.