As the months and years go by, Microsoft keeps steadily moving away from its old model of PC operating systems, which started with buying Seattle Computing Products' 86-DOS, aka Quick and Dirty DOS in July 1981 and renaming it MS-DOS 1.10, toward Desktop-as-a-Service (DaaS). //

Back in the ‘80s, compute power lay on mainframes and Unix-powered mini-computers. PCs were a revolution. But in the 2020s, we're going back to a model where all the real computing happens on the cloud, and your device — even if it’s a $1,399 top-of-the-line iPhone 12 Pro Max — is just a glorified VT-102 dumb terminal.