It certainly doesn’t have to be Fortnite in particular, which has over 80 million monthly logins, but if you are on a bus or subway count the number of people who aren’t reading, playing, or watching content on their phone during the journey.

As another example, Nintendo completely discontinued the non-XL 3DS models in the USA.

I think you aren’t wrong, there are enough people somewhere to buy a small screen smartphone, but apparently that number is small enough to not even open up a single assembly line for.