If I've got Outlook open I don't want another Outlook open. Why would I want that? I want to go to the version of Outlook that I already have running! This renders a 'launcher' pointless. I only 'launch' Outlook once a day.
I've yet to find – and I stopped looking a while back, because I stopped using the OS – a Windows 'application launcher' that does this. If Win+R does this then you've just blown my mind, but I don't think it does.
Is this a result of the way that Windows and Mac treat running apps differently? I only ever have one instance of Safari.app running, for example. That isn't the case on Windows, so how would a 'switcher' know which instance to pick?