As a realtor, I watch various aspects of property. One such aspect is the demise of big, old mainstream denomination church facilities.
Met an agent that works exclusively for an infill residential builder, that looks for church sites which can be purchased for the land.
Apparently when the congregation shrinks, and shrinks they have a very valuable asset in the facility, they can sell, salt away the funds, and continues their services in smaller facilities.
There are two examples of this right now, one already built in houses, another soon to be.