Has it even been tried? Is there an iPhone text editing app with fully customizable keyboard that allows for setting up modes/gestures/shortcuts, scriptable if necessary?
> A natural language prompt like “Hey Google, what’s the weather in San Francisco today?” just takes 10x longer than simply tapping the weather app on your homescreen.
That's not entirely fair, the natural language could just as well be side button + saying "Weather" with the same result, though you can make app availability even easier by just displaying weather results on the homescreen without tapping