RPGMemes

That's just called 1600s era half plate.

As halberds and other armor penetrating weapons became normal (and Guns), the focus of armorers was on deflection rather than outright stopping blows.

Also, iron became cheaper and thus mass produced. So in some sense armor got worse, but far more people were wearing armor. The small bits (gloves, legs, etc etc) couldn't be custom made per person anymore because of mass production templates. But armor was well on its way out by then anyway as guns were obviously the future.