Concept isn't original anymore and people stopped watching. In today's society there's social media and a ton of reality tv, so being exposed to different types of people and lifestyles isn't anything new. I can imagine if I was back in the 90s or early 2000s with no internet or reality tv all id be exposed to are the kids in my town and the sitcoms on tv so getting people from around the country together to talk and sit around would be interesting. I can do that on the net now in seconds so they have to create drama and gimmicks to get people to watch
The thing about RW when it started was taking kids that would never cross paths and throwing them into a house together. Take a black kid out of brooklyn, have him live is some country ass chick, a suburban cac, some latino that has barely been in the USA for a minute.
That was interesting TV without fukkkery. Those first few years of RW they had some great discussion about race, class, and a bunch of other important shyt. And it was before the popularity of the internet and social media boomed, so most likely you weren't hearing how other people different than you veiw the world.
If they tried to do that today, it would be boring as fukk and get cancelled.