How many factions are there?

I voted for "The more factions, the better." While this is certainly a good idea, if there are too many factions in the game, it will simply be chaos. After all, for each faction, you need to come up with units, a story, and so on. If there are too many factions, the units will be similar, and the story will become confusing, so my motto is "The more factions, the better, but know your limits."