How many worlds/save files do you have?

I think I have 4 or 5 right now, but I had to restart my whole game a year or so ago (that happens to me intermittently. I've never been able to go for very long without my game crashing or losing all my saves one way or another and needing to reboot). I tend to often make sims based on my favorite books and shows and things, and I like to create or edit my whole world to fit whatever my current story is, so they don't always fit together. My Powerpuff Girls world did not look like my Game of Thrones world, y'know? Plus, I usually play with aging on, start with just one household, and then slowly expand and have the world evolve with it. In one of my lost saves I ended up with...I think almost 20 played households? All descended from my one, first created sim one way or another.