You're probably right, but if so, Apple is taking a short-sighted view. We're moving on from product and platform wars to ecosystem wars, and the core feature

You're probably right, but if so, Apple is taking a short-sighted view. We're moving on from product and platform wars to ecosystem wars, and the core feature of Apple's ecosystem is all Apple software and hardware working together (preferably to the exclusion of non-Apple products, but not always). Having control of everything gives you the best chance of making everything just work. Dropping products (X-Serve, monitors, routers etc) and neglecting products (Mac Pro, Mac mini etc) makes the whole ecosystem weaker. For comparison, the main rival ecosystems are Google and Microsoft. Google's is based on doing everything online and creating a complete Google stack. Microsoft's is based on supporting everything cross-platform (Windows, iOS, Android, MacOS and increasingly Linux) both online and offline.