How many cats do you view as too many?

Obviously some parts of having many cats are restrained by money (vet bills, food, litter, etc), space, etc. But assume someone has all that. I’m talking about the emotional aspect, and the ability to make sure each cat is loved and having their non-standard needs met. I’ve met family with 10-12 cats, and many cats had behavioral problems surrounding the want for attention, with enough humans/time of those humans to make that feasible.

I have 3, and I’m seriously doubting if I could emotionally make sure the needs are met of more than one more maximum. Just curious where that number, if any, sits with my fellow cat owners 🙂‍↕️