Depends on the type of tobaccos involved. Virginias and Burley age well. Latakia "softens" - fades - with age.
Definitely read the Pease article. It's good to get info from somebody who actually knows what he's talking about.
The "ten year" milestone is a myth. It's just an arbitrary length of time that's become fixed in the minds of some smokers. Why not say seven years, four months, eighteen days, and forty-seven seconds? It's just as legitimate. You may find a change with six months of aging.
Pease indicates that the most profound changes occur within the first two to five years. After that, further change is incremental. You don't have to wait forever, or spend a fortune on "vintage" tins, to have a wonderful smoke. Most tobaccos ARE ready to smoke when released. The tobaccos within have already been aged.
Over time, the various flavors imparted by the components and the casing will meld. New, a blend may taste of its components. A couple of decades later, the flavors those components will have cross pollinated, often resulting in a homogenized flavor.
The flavor of some blends may change considerably over time. For example, Escudo is more peppery when fresh, more fruity when aged a few years. I like it both ways. So I have a few tins that are fresh, and a few tins that have some years on them.
Aging does offer the benefit of removing the "rough edges" of some blends. But every blend will eventually fade or go completely strange. I've smoked vintage tins as old as 90 years of age. Those really old tins were crap. Once in awhile you get a nice surprise, but it's truly a crap shoot. I've had Capstan Blue from 1938 and 1941. The 1938 had completely failed, unless you like the taste of dirt and mushrooms. On the other hand, the 1941 tasted like Capstan, but smoother. It also was considerably miniaturized in flavor.
So enjoy what you have, put some away to age, but don't get too caught up in the myth that tobaccos only get better with time. It ain't true. Like everything else on this planet, including you, and certainly including me, eventually tobacco blends decline and wink out.