The argument that most people use a phone two handed most of the time is a bad one, because when you need to use the phone one handed, you need to. Trivial in the grand scheme of things, but it is those little things that make an operating system enjoyable. That's where Apple wins out time and time again: the look and feel is always high-end and you can sense that the user experience is always in their minds. On the other hand, I often get the feeling with MS stuff that there is a vast bureaucracy ruling behind the scenes that is endlessly constrained by the needs of other parts of the company. The menu system for phones seems to be getting changed so that it can both make it more like Android to make app developers happy, while at the same time working on tablets, laptops, and PCs. Compromises, compromises. Personally, I think trying to cram everything onto phones is making them less useful, and I'm not that enthusiastic about the idea of universal apps. I'm simply not going to be using Excel or Word on my phone for anything but possibly reading a document or maybe editing a word or two. It is productivity destroying to waste time trying to do work using a tool that isn't appropriate for a job.