Since you don't know what manufacturer the article was referring to, I understand your concern. While all manufacturers produce a few lemons, I think most RVs will be on the road far longer than 5 years if the owner cares for them properly.
Fifth wheels are certainly less complex and have far less moving parts than diesel pushers. There are a multitude of fifth wheels that will probably meet your needs and give you many years of happy camping.
Your question will probably just be answered by those that are happy with their fivers and think of them as upscale. I certainly like my Columbus, but also realize there are a number of others that are quite serviceable. We liked the floorplan, it had the amenities we wanted, and the interior decor we liked. I looked under the floors in the storage compartment for the way it was wired and plumbed, and behind drawers and cabinets and the construction looked good.
I did not buy mine to fulltime in, even though I think I could. You are not guaranteed to get a better constructed RV just based on price. You can certainly get more amenities, better leathers and fabrics, appliances with more features, larger refrigerators, granite and more luxurious flooring, etc.
I would rather have a Culumbus constructed on a Wednesday than a Mobile Suites constructed on a Friday if reliability is what you are after. I'm sure I am opening myself up to plenty of bashing by some, but this is only my opinion and it's worth every penny you paid for it. I do wish you good luck in finding a fiver than will work best for you.