I went into radio in 1965 when I got a license for CJOR 600 AM. It was my second business.
Today, public companies don't like the idea of conglomerates. People want to buy something in which they know where they are putting their money - into the food business or the oil and gas business. They don't want to put their money into a hodge-podge as a general rule.
No matter what business you are in, there is change, and it's happening pretty quickly.