Therefore, I always treat with understanding and a little sadness when great racers leave in the past. If I'm not mistaken, Vettel was the champion in 2011-12, 13? but 10 years have already passed.
Especially a few races ago when he complained of his back giving him problems with the constant bouncing of the car on the track.
You can see this when he was trying to get out of his cockpit right after the race and he was holding his back.
I think I remember some drivers well into their 40's still driving but probably not at a professional level such as F1.
This isn't to say that Hamilton is at 100%, he is definitely not anymore, he is losing his edge and I think he will retire in a year or two, because he wouldn't want to be on a bad team like Vettel or Alonso did, hence he wouldn't just move back to Williams and enjoy, he will straight up retire.