Buy a bunch of third-party apps (like Sunrise and SwiftKey) and slowly but surely integrate them into your own products (like Bing and Outlook) to gather more data?
I'm entirely used to one of them (SwiftKey) and I've tried several others as well. They've all offered amazing user experience, but I'm just not comfortable using Microsoft's Launcher for example.
Which is what Microsoft is doing. So if we're considering this part of their mobile strategy (which is fair), Microsoft hasn't actually abandoned mobile at all.
I'm entirely used to one of them (SwiftKey) and I've tried several others as well. They've all offered amazing user experience, but I'm just not comfortable using Microsoft's Launcher for example.