I am not discrediting the PS4 when I give the Switch props for its success. Sony has crushed it this generation. Sony nailed it, and has been and will remain the market leader for the remainder of the generation. With that said, a manufacture can sell less units and still be very successful. Japan may not be a huge percentage of the global market, but it is a huge market just the same. Sony is and has been doing well in Japan, so when I say Switch is selling five times as many Switch units, it isn't to slight Sony, but to show just how well Nintendo is doing in their homeland.
Sony's CEO just recently commented on how they shouldn't ignore the success of the Switch. Just because Sony is the market leader doesn't mean there is no competition. Even a two to one ratio is pretty aggressive competition. I am pretty sure Sony feels like the 30+ million Xbox One units sold felt like competition. Why? Because if it weren't a thing Sony would have sold a boat load more units than they already have.
No one is clinging to anything, but we only have so much info available to us. We must extrapolate the data available to us and make some reasonable conclusions. When I look at the available data and see Nintendo killing it in Japan, and then also taking the top spot in the NPD charts for multiple months in 2017, it brings a positive vibe surrounding the Switch platform.
Sony and Nintendo aren't competing, the market is really different not the same type of gamer. Sony competition is the Xbox division..