I don’t know. One side of my family had the multi-generational thing going. They all got along great and it was lovely to see. Will always remember all the “old folks” rocking away in the living room. I personally left home at 18 and NEVER could have lived with my parents . ...which is sad.
I would like it with my own family, but there would have to be enough room, separate entrances, and places to go to get away and be alone, or to get work done. Other than that, I’d love it ... I think what’s important is that everyone minds their own business and keeps their mouths shut when appropriate. I think it takes a lot of mutual respect for everyone in the family for it to work ...