Same engine, slight retune, not six years-worth-of-dev-new. Much more of an iterative upgrade. Compare, for instance, Ocarina of Time (1998) and, Windwaker (200

Same engine, slight retune, not six years-worth-of-dev-new. Much more of an iterative upgrade. Compare, for instance, Ocarina of Time (1998) and, Windwaker (2003), vs Ocarina (1998) and Majora's Mask (2000), and you'll see that BOTW/TOTK is much closer to the latter than the former.