Owning more than one bike is a good thing, my Dad once said that it was good to have a bike for each mood you had. The problem comes when one of those bikes stops working. If the bike is one that is used every day then the pressure is on to fix it and quickly. If it's one that is just an occasional indulgence then the pressure is off to fix it and it tends to be put towards one side.
Then you end up with nothing more than an ornament taking up space. I suppose this is just a prod to clear out the untouched bikes, or pull my finger out and fix them more.