Or maybe Microsoft finds it's a cheaper and easier to leverage their monopoly position if they operate in "perpetual beta" by rushing out new features before co

Or maybe Microsoft finds it's a cheaper and easier to leverage their monopoly position if they operate in "perpetual beta" by rushing out new features before competition can get a foothold, then using their (paying) users as their testers. Rather than, say, testing and hardening their products sufficiently before launch.