Not "look like", that's how they operate. I love it, wish all companies were committed to quality and longevity, it would be the kind of world I'd like to live in.
Nikon is also pretty obsessive about compatibility, I can mount lenses from the 70s on my D7100 and the features work.
In terms of underperforming, it's hard to define underperforming. Regardless of what some guy on a blog thinks, I have had many clients comment about how impressed they were with portraits I took of them with lenses from 1971 and 1993, and 0 complain about how the same lenses' corners look soft when shooting a test chart wide-open then blowing it up to 400%.
Thay being said, I'd never replace a lense unless it either broken or I see negative impacts on image quality. If none of that applies I don't see a reason to spend a fortune on new glass just because. Unless of course I want that lens.