Want to see what masterwork Plate Armor looks like? Check out this suite of Plate from 1520 made for King Henry the VIII. It is exceptional and has no visible gaps in the plate. The articulation is kind of staggering. Even more staggering is the fact that he never used it! Henry meant to wear it at a tournament in France at the Field of Cloth of Gold in 1520, but the rules for foot combat were changed so the armor was left unused.
It isn't a total waste, as it shows up what master armor smiths were capable of at that period.