How many worlds/save files do you have?

I have a main save file for the Sims 4, an alternate save file that was for specific streams but now that excuse is gone and basically a file where I was making characters from Fire Emblem Three Houses. I got like the main three houses done for that and haven't gone back and made the Church of Serios folks. Need to do that at some point.

But otherwise, I tend to just play with that one personal file. Long timespan, only aging the one household at a time.