Windows 10’s new “hamburger” menu (dropping down from the top left), works well as a “home” menu for an app, but is apparently less useful where there’s no point in it being there. It gets a little bit more complicated when the operating system’s mobile and PC iterations go in different direction. While switching between tasks on PC-based Windows has typically left to right, with mobile it’s the opposite. Is Microsoft going to over-rule one standard design practice for another? Maybe. “We want to have a good understanding of how tough it is for phone users to relearn before we make a final call.” Given that Windows PCs outnumber Windows Phones, it may be an easier call than you’d think.