Well it depends on what you're designing. For a general-purpose OS used by everyone and their grandmothers, it makes sense to have them in mind and let the more

Well it depends on what you're designing. For a general-purpose OS used by everyone and their grandmothers, it makes sense to have them in mind and let the more advanced users customize the settings. And I would assume non-computer-savvy folks are indeed the largest demographic too, though I don't have data on it. And also, if you believe it's a good thing for the world to become digital (say, to reduce carbon emissions), you need products and services to be accessible to most kinds of users.