I think there are severe production quality issues in the industry but I don't think it is in death spiral. Death spiral would come from other factors-economic for example. I think the industry is very cyclical and has been for decades.
There are examples of well made RVs in most categories. Born Free listed above is one. To newbies: If you care about quality you may have to prioritize it over size, so called luxury, etc. for your price point. If you can find a well built model with the factory close enough for factory service, so much the better.