Have owned 3 Thor Industries TT's now and pleased with each one. (Dutchmen Sport, Keystone Springdale, and Keystone Outback) Issues? yes, but minor. Expected issues? Yes.
So, when you purchase a brand new car, have you NEVER had warranty issues either?
When you purchase a brand new house (ok, even a used one), have you NEVER had some kind of issue arise after you parted with your (credit)???
Have you ever purchased a CD just to find out it had a scratch and you have to replace it?
Have you ever purchased a toaster and plugged it in, just to find out it did not work? A television? A radio? A Cell phone that went ka-put the day after you purchased it?
If you REALLY consider all the technology that goes into an RV, it's amazing that anything works at all.
100% systems for 120 volt AC power that works flawless with 12 volt DC power, that also works flawless with house lights, turn signals, refrigerators, you name it. Mix gas and electric appliances that can switch back and forth, water, plumbing systems, and then add an engine, drive shaft , suspension, and you name it (if it's drivable vs towable) you're looking at some very complicated and sophisticated technology inside any RV. Add to that televisions, radios, microwaves, stoves, ovens, and everythig else, .... well .....
The odds of "something" being missed in a PDI is not all that surprising.
Many items that get unearthed in an RV are found when they are actually being used. We had a miss-fit drain in the shower in our new Outback. Did anyone at the factory take a shower in it to determine if the drain was installed properly? NO! Would you expect them too? No..... Would you expect the dealer to take a shower? no..... The mistake was caught by ME, when I used it. And yes, it was fixed at the dealer under warranty.
Anyone who purchases an RV has a certain amount of responsibility also, you know. As the person making the purchase, YOU have the responsibility to thoroughly inspect the product before taking delivery and signing the bottom line and parting with your money. So, the responsibility does not rest 100% on the dealer or the manufacturer there, if you take delivery and then find something wrong.
Note: Let me correct that "responsibility". The manufacture and dealer have the "responsibility" to stand behind warranty work. But if you take delivery and something is not right, YOU had the responsibility to discover it, just as much as the seller did too. Don't blame the seller after the fact, if you've not done your part first. If you don't like the product, you don't have to purchase it!