Jim
I think all refrigerators should work correctly from new,however some of the installations I have seen,from many different makers ,have raised alot of eyebrows.
Walk around a campground or a dealer,and look at how high the unit is installed in slide out and then try to figure out how that "chimney" is going to flow air and you will see what service people are up against
Ultimately, I guess it's up to the maker of the refrigerator to design one that will work in a galley slide out,so the cooling unit won't run too hot.
Of course ,they could put a compressor/electric unit (like from a house) in a trailer,but that would take involve many batteries and a large inverter to dry camp and would require a generator install to keep the house batteries charged
so.this is just my opinion
Rich