From the consumer perspective, probably. But from a laundromat's perspective, even if only a fraction of users use coins, they still need to deal with coins.
Once you're below some use threshold, a lot of places would prefer to ditch cash entirely.
Once you're below some use threshold, a lot of places would prefer to ditch cash entirely.
It looks like something similar is in effect here: instead of meeting the different customers where the customers alrady are, it's the company's preferred way or the highway.