When it comes to age you're usually not going to see much progress beyond the first year.
Maybe people should compare tobacco ageing to Whiskey instead of Wine (even if they are totally different mechanisms).
Whiskey develops for a few years in the barrel, but "10 years aged" doesn't mean it's going to be the most flavorful, Peated Scotch is going to be strongest when it's young and Bourbon from the hot south only needs a few years to soak up all the barrel tannins.
Again, these are all very different mechanisms but the point is the same, there is benefit in some age, and things will continue to "change" with more time, but if you're just looking for fullness of flavor then waiting 10 years isn't going to provide more benefit than the first 1-5 years.