From his own writing Bruce Lee said that Jeet Kune Do is a style based on the user's own ability and knowledge of other martial arts.
Using all your knowledge of other styles and at the same time disregarding rules and guidelines of said styles is the essence of Jeet Kune Do.
Being able to adapt yourself to any fighting situation is what Jeet Kune Do is all bout.
Your view is that of the current ignorant Jeet Kune Do community who are elitist and often the subject of much laughter and criticism in real fighting circles.
So yes, it is infinite. It is as infinite as your knowledge and experience is.