If There Was No Household Size Limit...

If there was no limit it would actually cause the game to stop playing, and everyone would stop moving. I tested this out with a couple of different mods from Sims 2 and Sims 3 and the results were the same. But I do wish that they would give us an option on the number of sims past 8 that we could play in the same household. Even past Sims games allowed more than 8 when you had pets. If memory serves me correct I the number was increased to 10. Only 8 humans max were still allowed though.

I would play with as many as my computer could handle. :D I love playing large families and right now I use MCCC to let me play with more than 8 sims.

I get sick of just three Sims in a household if I'm trying to control them all. Any more than that, and those Sims have to take care of themselves.

I would still usually play with 1-2 sim households. Now and then I play full households but it's for a challenge or something, or in rotation I'll play a family for a little while (not usually bigger than 4-5 sims).

As many as my computer could handle haha

I would like to play with a large family (lots of kids), or ‘royal’ families with lots of servants in addition to the family. Or even something like Downton Abbey where there are a lot of people with lots of storylines at once.

So no specific number, but probably a max of 20? Humans and pets total.

I don't play really big households often as when my kids become adults I normally move them in with their spouse. A couple of times I had one of my children and her twins stay in the family house because she divorced her husband. So for that reason the maximum of 8 per household doesn't bother me too much.

That being said, in my current save both my adults are 5 star celebrities and live in a massive mansion. I would love to raise some of the grandchildren there because it's perfect for a big family.

I would like to have maybe 10-12, mainly because I like having around 4 cats/dogs in a household but as it is now, I have to choose between having only a few pets or only a few children (my sims have big families a lot)

Isn’t the cap on sims that can load at once on a lot, something ridiculous like 18? But like other people mentioned even a full household now of 8 causes performance issues :(
If they could sort out the performance issues I’d love to have an increase, maybe double it to 16? Plenty of room for all sorts of households and scenarios :) 100 baby challenge would get a whole lot harder haha

still only up to 4 max, I am easily overwhelmed with too many sims, 4+2 pets is the max I can handle :D