In my opinion, you don’t understand the Rubik’s cube if you don’t know how to solve larger ones. I’ve never held a 5×5×5 or larger in my hand, but I know I can solve it or any larger one easily.
Variants such as dodecagons can be a little trickier, as knowledge doesn’t transfer as easily, but if you understand the cube, you still should be able to solve them reasonably quickly.
Variants such as dodecagons can be a little trickier, as knowledge doesn’t transfer as easily, but if you understand the cube, you still should be able to solve them reasonably quickly.