Actually the practice of companies managing their own energy preceded the creation of the electric grid, and preceded the existence of software companies by ove

Actually the practice of companies managing their own energy preceded the creation of the electric grid, and preceded the existence of software companies by over a century. Even today most large scale engineering outfits are both vertically integrated and use vertical integration to launch into other markets (e.g. General Electric, and Tata, which was a steel company.)