Fixed it! Yeah... I found a good reduction method tutorial. If you use the reduction with a 5x5, will you be able to use it on the 4x4, 6x6, and 7x7?
idk about the 6 and 7, but I was able to figure out the 5x5x5 based on what I knew of the 4x4x4, except for solving the final two edges.
So if you know 4x4x4 reduction, you'll definitely be able to do 5x5x5. 5x5x5 is also simpler due to the fact that since it's an odd numbered cube, you get less parity issues, and you don't have to worry about getting your centers correct. I personally find the 5x5x5 much easier than the 4x4x4.
As far as why someone would bother learning cage, I don't think it's even an issue. I mean, you're sitting there with a cube in your hand so that you can make all the sides the same color, and you're worried about the *point* of learning to do it a certain way?? The *reason* someone would bother? Cubes are pointless to begin with, they're just good old time-killing fun. No point necessary.