Are there any statistics about this? In my southern Brooklyn neighborhood, which is on the cutting edge of approximately nothing, the laundry rooms in all three apartment buildings I've lived in converted from coin payments to stored-value cards in the mid-2000s.
Before they switched to cards, did they have a coin change machine?
My own building was only built in the 2000s and has a single coin operated machine. It was also fairly cheap. I suspect that many conversions are funded and operated by an outside vendor.