I think his concern is that UWP apps are the first step towards blocking non-UWP apps. Kind of like Apple does on MacOS X, where you have to dig into the securi

I think his concern is that UWP apps are the first step towards blocking non-UWP apps. Kind of like Apple does on MacOS X, where you have to dig into the security settings. From the article: "The specific problem here is that Microsoft's shiny new 'Universal Windows Platform' is locked down, and by default it’s impossible to download UWP apps from the websites of publishers and developers, to install them, update them, and conduct commerce in them outside of the Windows Store," said Sweeney. "It's true that if you dig far enough into Microsoft's settings-burying UI, you can find a way to install these apps by enabling 'side-loading.' But in turning this off by default, Microsoft is unfairly disadvantaging the competition."