Richard Stallman has written a thought-provoking article on Service as a Software Substitute, or SaaSS (his term). Many people don’t like Richard Stallman, but he does offer clear and contrarian thinking. His “The Cathedral and the Bazaar” influenced the direction of software development and you should read this article Who does that server really serve?
While I agree Stallman did good things for Free and Open Source Software, “The Cathedral and the Bazaar” wasn’t him. That was written by Eric S. Raymond.