The smartphone industry wants you to buy a foldable phone. Should you get one?

Three generations of mobile devices: The original iPhone, a contemporary flagship phone and Microsoft’s foldable Surface Duo.

The last few years of smartphone innovation have been a bit of a disappointment. Manufacturers seem to have run out of ideas. Every year screens are getting bigger, bezels thinner, camera arrays increasingly bizarre. The modern smartphone has turned into an Instagram monster — ideal for taking pictures and scrolling through visual feeds, but not for too…