I'm going to totally ignore the problem of fitting too many people on a tiny little street. Gonna set that aside for a moment. That and the possible parking problem, 'cause everything comes down to parking 'round here.
What I will do is remember group housing. I have lived in group houses. My spouse lived in a group house. I know others who in their 20s lived in group houses, it is a thing people do around here; live in group houses.
One of the terrible scenarios brought forth during the BACA meetings against the idea of the co-housing was the idea of live in girlfriends (not boyfriends, I wonder what the gender issue is with that, but I digress) in every unit doubling the occupancy beyond what is legal. In London, I lived in a group house of 6 girls. In PG County, while in grad school, I lived with 4 girls in a small house. At no time did all of us have our boyfriends over at the same time. Maybe two guys might be in the house on a rare occasion. Asking the spouse of his experience, living with 3 guys. Maybe two guys would have their girlfriends over on the same night. The only guest who was a problem, the catalyst who inspired my spouse to move out of the group house, was one of the roommate's dad who stayed for an extended amount of time.
No I predict the problems Richardson Place neighbors will have are the same problems all current residents have with new residents. Parking, noise, and personality conflicts.