I think folks here know we have a multi-generational household going at our place… It works for us.. we can help with the care of my invalid father in law, and my kids get more time with their grandparents.
That said – multigenerational living can also be negative. We have a nephew who’s in his 30’s and lives at his parents house. He chose to major in History, got a teaching credential, got a masters… then got his PhD – all in history. With budget cuts he’s taught exactly ONE year. (before he got his PhD) He’s unemployed, is an asshole to his mother, doesn’t help around the house, isn’t willing to get a job since he feels he’s overqualified to work retail or at starbucks. It’s not a good situation. His sense of entitlement could fill several rooms. Fortunately, his siblings are all self supporting and have careers (everything from nursing, to high GS level employee, to working electrical/gaffing). They tell their brother to get a job… it falls on deaf ears. Also unfortunately, his dad totally buys into having his son live at home.