Fallacy of BDP's lost glory

“One of the most consistent patterns in business is the failure of leading companies to stay at the top of their industries when technologies or markets change. Goodyear and Firestone entered the radial-tire market quite late. Xerox let Canon create the small-copier market. Bucyrus-Erie allowed Caterpillar and Deere to take over the mechanical excavator market. Sears gave way to Wal-Mart.”, writes Joseph L. Bower and Clayton M. Christensen in reference to Disruptive Innovation in the January to February 1995 Harvard Business Review.