Even in 2024, he had 10 PBU's and 3 INT's. This was despite teams avoiding throwing his way.
The last time I recall seeing this kind of performance out an "old man" defensive back in the NFL, was when watching Ronnie Lott play for the 49'ers and later, the Raiders. I still remember getting pissed at the 49'ers for putting him on Plan B free agency after that 1990 season, at which point he had one of his finest seasons for the Raiders in 1991, and some pretty good seasons for the Jets later.
Still, Harrison Smith is in much better physical health than Lott was in his last 3 years of playing. I'm sure there were others who had good seasons in their twilight, but I don't recall anyone being nearly as good as Harrison Smith has been.
The only thing missing from his trophy case would be a Super Bowl ring. I'd guess that in that keeping Adrian Peterson might have swung it their way in that 2017 season. They were basically spooked by his 2016 injury, and cut him loose afterwards.