Probably more in the 90s since the 80s were all about total quality management. But "companies became a lot more interested in making their shareholders happy

Probably more in the 90s since the 80s were all about total quality management. But "companies became a lot more interested in making their shareholders happy than they were in making their customers happy" is the BIGGEST problem with modern capitalism. That is why US is approaching 70% obese population and other dramatic social problems.