I am a child of the 80s and my siblings turned 18 in the 90s, none of us went away to uni, all chose vocational courses and employment.
We all lived at home until we had the deposit and a partner to buy our own place, we were all 22-26.
Housekeeping was paid to cover our food and utilities but to be fair our DP had a —very— large house and didn’t need the money.
Chores had been part of our daily routine since we were teenagers so we were all quite capable, none of us cooked regularly as the was DMs thing, but if she was out or wanted a day off DF or one of us would step in.
My DH was a regular visitor before I moved out and was allowed to stay in my room, although on the pull out bed not mine.
I now have adult D.C. one is in their 20s living at home and may move out next year if they decide on a uni course that is not local, the other will be at uni for 2 more years, although this is their home and when they are away it is just a rented room as far as they are concerned.
Both of them cook, keep their rooms tidy,do their own washing and generally contribute as both me and DH work long hours
Sometimes I’d like an empty house but generally I like having family around me.