Wooly... You probably are reading the 27FB threads, which are true and not fiction.
From what I understand, the 2021 FB's have been... fixed? As far as the Indents of the lower left and right corners. We had a lively discussion concerning this and the undefined Separation issues of older FB models. Corrosion may be the real culprit of the hidden riveted aluminum skin. Not rivets.
You probably have the Right of Refusal when the trailer arrives at the Dealership. Ask for a 100% walkthrough. Everything is operating. Propane appliances. Electric appliances. Fresh Water tank full. Some water in the Grey and Black Tanks.
At the end of the walk through... look for water drips underneath. Smell for Propane at the Propane tanks... these regulators being used do leak, somewhat. I bought a spare in the event mine fails.
The trailer then will be under water pressure, air in the water system purged.
Confirm yourself that the radio works. Televisions work... etc. 100%. If something does not work... it needs to. The Dealer may say it has to be Sold before they can do... warranty work. I do not know. If anything is not working... it should be... before you pay. If it cannot be repaired at the Dealership... it is on their Dollar, not yours.
My 2006 had a long list of issues. I cannot recall them, but in 2007 we drove to Jackson Center and spent about five days. We used it for 8 years. Loved it. Bought a 2014 25 foot and this time knew what to check. Sold it after 4 years and stepped up to a 2019 27 foot. FB.
The Las Vegas Airstream dealership did a 100% top to bottom operational show and tell. We were 100% content. My wife is even more detailed orientated, than myself.
A miracle in my focus on getting what I pay for...
A perfect Airstream, twice from knowing what to do before buying.
It WAS 100%. Everything operates as I type. The Front End Indents were later and probably not going to be fixed, as the Fix... may be worse than the indents and tear.
Just confirm these issues with your Dealer. Inspect the outside, inside, top and bottom. If this is your first... have an owner help. This is an expensive purchase. If it meets your expectations while on the Dealer's Lot... you will be a happy owner. Like my wife and I.
First item to test. The batteries. They may install them AFTER delivery now. In years past... the batteries were DEAD on Arrival. When they demonstrate the trailer, they will be plugged into their power. The AC's, if you have two running, might trip their breaker... just saying.