I certainly count my lucky stars that we have not needed any major repairs in the 6.5 yrs. we've owned our coach. Certainly a repair or two beyond regular maintenance but we have never been stranded or any trip ruined due to any failure.
Our coach seems to be running so well right now I'm a little afraid of moving to a new coach which we are seriously thinking about doing. I think our coach is in it's prime for a used coach and still has decent value (new enough for a new buyer to get a loan if needed).
I feel sorry for people who have major issues with new coaches, especially serious issues requiring long down times. These things are not cheap and you would think that they would be made better with fewer issues.
MM.