We've had 8 years and 68,000 trouble free miles...

Spectacular!
As the adage goes, generally those that have issues are the only ones you hear from therefore making everything “seem” like it has issues.
Have had a similar experience being on our 3rd camper now. 2 TCs that were well used when we purchased and our new to us 2017 trailer.
That said, care, diligence and a bit of aptitude also go a long way in making things “not an issue.”