Article in full here...
For all the grief the tech industry has given Microsoft about its lack of Windows 8 apps (yours truly included), here's a funny thing: Most Windows 8 users aren't even using so-called "Metro-style" Windows 8 apps.That means they are mostly using Windows 7 apps via the Windows 7 "desktop" mode, according to new research from Soluto, a startup that helps people remotely manage Windows devices.Soluto looked at the activities on 10,848 Windows 8 machines and discovered that about 60% of them don't even open one Windows 8 app per day. Those who have a Windows 8 tablet, versus those with Windows 8 on a laptop or PC, use Metro apps more frequently. But some 44% still don't use a Windows 8 app every day.This validates the advice we've previously offered, that there's little point in upgrading an existing, non-touch Windows 7 PC to Windows 8.Soluto came to much the same conclusion, saying there's "no rush" to upgrade. "Wait and see what 'Windows Blue' has in store for us before you upgrade," it advises. A public beta of Windows Blue, now officially called Windows 8.1, will be available in June.Here's the chart on how often Windows 8 users open a Windows 8 app.

OP's thoughts...
I *barely* use Mail/Outlook, and when i did, it was because I managed to sync GMail to it, and i used the outlook.com email for spam and crap. But hey, because I stopped writing Windows code for the past 5 months, I went back to Linux Mint.