Visually would look kind of like K, yes; but K (obviously) isn't a stack language, and more importantly, K has operators that consist of multiple characters, an

Visually would look kind of like K, yes; but K (obviously) isn't a stack language, and more importantly, K has operators that consist of multiple characters, and circumfix operators like {}, etc. So it really has none of the qualities that a bytecode has. Whereas Uiua/ASCII would have all of the qualities that a bytecode has.