The manager of operations at Beta Industries most likely told his wife that smartphones and streaming became substitutes thanks to advances in technology.
As a result of technological advances which continually strive to improve on what is already there, there have been newer technological devices.
Smartphones and streaming services are examples of some of these advances and they have emerged as strong substitutes to DVD players which are not as mobile.
Find out more on technological advances at https://brainly.com/question/2166344.