The realistic digital equivalent resolution of 4x5 film is around 40-50 megapixels, which iPhones have supported out of the box for a couple of years now.

Of course there's a lot more to taking good pictures than the raw sensor, but what I'm saying is that the barrier to entry is way lower than it was in the article's day.

I'm sorry but 48mp on a sensor the size of the end of a pencil is just not the same as even full frame, let alone 4x5.