This fucking ESSAY. She’s our WRITER GIRL.As an obsessive Housewives nerd/historian, I love questions like this! @teddienono is also very brilliant on this topic (despite ha shit taste and Beverly Hills stanning!)
It's difficult to answer, however, as television ratings have been rapidly declining for years. Ratings are also nearly impossible to measure accurately nowadays as well, as so many people turn to streaming or continue using their DVR. Based on Andy saying Bravo is "thrilled" with RHOSLC and the amount of promo it continues to get, I would say it's a strong force on streaming, despite live ratings being questionable.
Potomac is one franchise that has steadily grown in popularity and ratings, however. It gradually picked up during season 3, which is when the quality also started to really become excellent. However, it really gained during season 5 in a major way, and now it is a big ratings contender for Bravo. It seems to be the one exception, as former ratings (and cultural) juggernaut Atlanta has been steadily declining, as has Beverly Hills, New York, Orange County, etc.
Beverly Hills is generally seen as being shit now, quality-wise, beginning with season 8. However, social media engagement with seasons 9 and 10 was pretty significant.
Dallas has always had shit ratings and I don't see it lasting much longer, unless it moves to streaming. However, most Housewives franchises still outperform most of Bravo's other programming, aside from the Below Deck shows, which are ratings gold right now.
RHONY had its highest ratings through season 4. It actually stayed strong following Bethenny's departure. However, it started to drop with the mass "re-casting" for season 5. Quality wise, however, it's seen as picking up during season 7 again and seasons 8 through 10 are generally beloved by all. Season 11 had a mixed reception and season 12 is a love it or hate it type of season.
Altanta's "glory days" left when season 9 ended and Orange County has been a "hate watch" type of show for a while, with season 10 being a cultural touchstone. I personally loved season 14 of OC, however, as did many of us here.
Again, Potomac is really having its moment right now and it's fun to watch along!