I think it's mostly an issue of experience. Younger engineers tend to make things more complicated than they need to be and are unaware of reliability issues.

I think it's mostly an issue of experience. Younger engineers tend to make things more complicated than they need to be and are unaware of reliability issues. Older engineers better understand tried-and-true systems and are more likely to want to stick with things they know work well. Obviously I'm speaking generally and individuals vary greatly.