That would have interesting implications. Companies would have to grow by aggressive diversification into other markets. Instead of a Google or Appple that controls your digital life, you'd have an endgame with a few ACMEs that attempt to lock you in in every aspect of your life: Your pots would work best with a stove from the same company. Your washing machine and detergent only do a good on a specific brand of clothes etc. A completely different kind of market regulation would be required.