Does it matter how old a house is if its completely rehabbed?

[Brandon Low]

As the title says... Does it matter how old a house is if it has been completely rehabbed? 

For example, lets say we have 2 houses:

House #1: Built in 1950 but has all major items rehabbed like roof, plumbing, electrical, HVAC, flooring, kitchen/bathrooms, etc...

House #2: Built in 1990 but has not been updated since.

Would the older house still be more prone to more maintenance and repair even though it has been rehabbed and updated?