The obvious downside is that all the UI elements are unnecessarily big for all the people not using touch.
Not anymore, a lot of apps (from browsers to the system UI) adapt to whether you have a touch screen and whether you use it. For example, Windows Explorer and Edge (and Chrome) still use (relatively-)compact widgets on touchscreen-less computers.
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Not anymore, a lot of apps (from browsers to the system UI) adapt to whether you have a touch screen and whether you use it. For example, Windows Explorer and Edge (and Chrome) still use (relatively-)compact widgets on touchscreen-less computers.