It can't be installed, or at least you give that impression and there are no instructions on how to install it, therefore it DOES need cracking.
The first part of that sentence is subjective, the second is provably untrue.
That has always been the only reason to get SX OS. Arguably SX Pro is still useful if you don't want to mess around with home made hardware, I was expecting aliexpress to be full of switch dongles by now.
He says the functionality is available in every open source CFW, so the only one out of that list that makes sense is that he didn't know.