I found the most insightful idea in a comment at the very bottom: "A user’s perception of a product is what causes him to purchase it and influences his satisfa

I found the most insightful idea in a comment at the very bottom: "A user’s perception of a product is what causes him to purchase it and influences his satisfaction with the product..." If users prefer to use the keyboard, they're not as likely to enjoy (and use) your "mouse first" software.