Reading between the lines, but I assume the author would agree on starting simple (feature A only), and only refine or add to that feature when the customer bas

Reading between the lines, but I assume the author would agree on starting simple (feature A only), and only refine or add to that feature when the customer base dictates it. If one customer suggests feature B, another customer suggests features B and C and a third customer suggests features B and D, then perhaps it would be a good idea to starting looking at adding feature B or "pivoting" altogether to feature B. And B may become more successful than A, but you never would have gotten there without first doing A really well.