[McAllister]

Applying realism to self-improvement is fundamentally incompatible with GURPS being a point-based RPG. GURPS gives groups the tools they need to answer the question "where do points come from" for any given game, and as an abstract resource, they should come only from abstract activities; trying to model realistic strength training would be somewhat reasonable in a game about strength training, but since most aren't, one should earn points and spend them on what one wants to have more points in.

To put it another way, "Earns CP at double rate" is an Advantage that could never be published.