There is no such thing in this—or most other—professions as a “plateau.” The Second Law of Thermodynamics states, briefly, that in any closed system (wherein no outside energy enters the system) entropy will result. A decline takes place as existing energy is exhausted.
Don’t kid yourself. If you’re not growing (creating more energy) then you’re declining.
Not much of a choice, is it?
© Alan Weiss 2016