Not an ATC-er, merely humble driver airframe.
In any discussion about experience, which generally is accrued via exposure to a variety of situations which manifest themselves over a period time and hence tends to be associated with age, and ability has to take into account one fundamental.
They are vastly different animals: the optimum combination is experience and ability. However, very often one encounters particularly able individuals who are young, and therefore lack experience.
On the other hand, one also meets very experienced people who lack ability.
Experience is all very well: a pilot, for example, with 10,000 hrs may well be a pilot with the same hour repeated 10,000 times.
In the driver airframe world, the core experience can be transferred from type to type, in ATC the same no doubt applies. Just keep absorbing the information and pass it on to the newbies; it all helps them avoid falling in to the same holes we did.