We started off in a 2-bedroom that was a little over 600sqft (maybe closer to 700). With the right layout and conveniences I definitely see how this could be comfortable without too many space constraints.
Faness yes it look likes it takes discipline, intentionality, and ikea. These people are in a 1 bedroom (yikes) and ended up putting the kids in the actual bedroom and they have a wall (Murphy) bed in the main space for themselves. I couldn’t do it. I have “the clothes chair” which would not work in the living room note - photo is not my actual chair mine is worse lol