Ok, a moment after deleting my post I seem to catch what the op is about and I am sorry for having deleted it.
I was perfectly right Roger in making my distinction about the circumstances under which a person may leave photography, even if photography has been a most central part of his life.
The circumstances, the reasons, the objectives to achieve - all these and more are part of the decision. I would say that a person forced by circumstances to leave, most of the chances will return.
In principle I can leave photography for a long period and restart it later. In fact this is exactly what has happened to me. The period in-between was one of doubts, uncertainity, etc. But these problems were not due to leaving a holy shrine illuminating my life per se, but due to the problems external to photography.
After solving those problems I have found myself in another square within photography. I have to re-define my purposes after accepting and settling my accounts. Since the first period was full of joy and excitment but not glory, who knows, perhaps my second one will be positive as well or even better.
At my 54 year on the planet I find life is quite complex to establish hard patterns, quite caotic to foresee any future, and nothing is to be discarded. It is more about how do you move and decide, than about fixed trenches.
Cheers,
Ruben