2019 sounds good, it would take a while for the Switch to pass 20 million I would think. The PlayStation 4 is already over 60 million units sold, the Switch is slightly over the 6 million mark. If Nintendo continues to release quality 1st party titles along with 3rd party I think they can continue their current momentum. Nintendo also has to make sure to keep the supply up to cater to the demand. I’d say by June of 2019 the Switch should be close to the PS4 in numbers.