I have now owned a few different RV's over the years. New and VERY used. The one that stands out as having the LEAST problems was the Cruise America Class C that I bought with 124,000 miles on it. Ran perfectly without issue inside and out other than tires and problems I caused due to user error. My new 2018 TT had/has over 30 problems I found before I paid for it. Then more problems after the shakedown trip. The dealer has now had my TT longer than I have since buying it.
When I go to dealer lots, I see issues clearly visible in almost every brand and style of new RV. Seems to be acceptable and the unfortunate norm to both (not all of course) dealers and manufacturers. Even some of the ones people claim never has issues. That's life with a rolling boat these days. Sad indeed.