Something tells me that the author was never around for the rats nest of incompatible micro computers that arrived in the early 80's: kaypro, osbourne, pet, commodore, texas instuments, ibm, apple, atari, coleco...

All of those computers companies made their own computers and OS's and a completely different stack of software and hardware peripherals. IBM getting into the game and creating a defacto standard with their hardware and software choices helped create a boom in the computer industry that we're still riding.