Not to pick on Ulrick, but I have a legitimate question: Is gaming the only hobby that evokes this reaction so often? What is it about gaming that causes people to want to give it up, the more product that's released for it?
Are there sports fans who want to quit if a new team is added to the league they follow? Is it because it's perceived that it is growing too complicated to keep track of? Or is it some form of commercialism disillusionment?
To me, if a product isn't released that I don't like, I don't intend to quit the hobby. It doesn't matter if not a single gaming company releases a single product that I don't like in a year's time - the only way I'll quit the hobby is death or extreme circumstances, because I know that the market is always changing, and as long as I have breath and a gaming group, I'll continue. Eventually new products will come along that excite me, and even if there are NO gamers around (let's say every single one of my gamer friends move away, and nothing's released for a year) I'll still comb message boards, still re-read my old stuff, create characters on rainy days, move on with the other business of life, and re-start myself as soon as opportunity knocks.
Then again, maybe I'm the one who needs help.

I'll be the one in the nursing home, cajoling the other geezers into a game...