Almost none, the only time I use my mobile in lieu of a desktop is when my desktop is unavailable or my home Internet connection is down. I don't count time I

Almost none, the only time I use my mobile in lieu of a desktop is when my desktop is unavailable or my home Internet connection is down. I don't count time I spend out and about on my mobile, since that isn't time I was going to spend on my desktop anyway. (And I don't think having the option of going outside with a mobile has changed how often I do so.)