Memory chips failing to me sounds like extremely bizarre fear. Memory has been extremely reliable for long time now. It is much more likely any other component on same mainboard failing than memory.
But, maybe if I try to salvage what you were trying to say: while failures are a fact of life, higher-quality products will try to minimize and mitigate more of them. Making more components replaceable, is the direction to improve resiliency, and therefore quality of the system. It could be impossible or highly impractical to make everything socket-mounted, but making more components socket-mounted is certainly a way to make a better product.
