Every single publisher has shown that the vast majority of their sales are digital. Sony themselves are one of the lowest digital percentage sales wise since they bundle their games heavily, and bundled games, even digital ones, count as a physical game sale.

Even if Sony are misrepresenting the numbers, Sony are in the money making business. If physical sales made up any significant amount of sales, to the point where they wouldn’t make as much money dumping them, they wouldn’t. It wouldn’t make sense.