Technological changes lead to old buildings always being behind the times and getting service changes as money allows. Particularly in a business setting, the space plan gets changed quite frequently-with each new management theory. Kitchens and baths have been increasing in space inside a residence and centrality of function for the past hundred years or so. It flickers in and out at a rapid pace. The low road is buildings that start out viewed as disposable.
Nobody cares what happens to the building.
When it is also easy for the tenants to change it, they do. The result is a building that is changed a lot, that supports its occupants well, and that is not expensive. It requires structure built to last and a very high finish of skin. It has a sequence of people who care for it extending over generations, especially people who take into account what has gone before. Architects are part of the problem.