There isn't much else for measuring software that's necessarily better. No idea what you're talking about as a solution for room reflections. What do you mean?
I'm not Danny, but I might be able to help on this one.
I agree that REW is now a pretty robust measurement tool, and that it is (still) generously given for free is a great thing for audio hobbyists. Reading your posts a few further up, I think I understand your confusion. As best I remember it, way back in the early 2000s when REW was new (and I was reading up on it and very briefly tinkered with an early beta when I was getting back in to the home theater thing for myself), as Anand pointed out in reference to its name - Room Eq Wizard
- REW was originally designed as an EQ management solution, primarily for subwoofer management in a home theater setup. Think of it like a primitive solution like Audyssey or ARC (Anthem Room Correction) that nowadays is baked in to home theater processors. At the time, this functionality was a pretty big deal because processors didn't just automagically have it built-in.
In short, automatic room EQ management functionality - now at the very bottom of the feature list on the REW home page - was actually the bread and butter of REW as a software product; the measurement functionality (which arguably is now possibly more commonly associated with being the "core" functionality of REW as a software product) was simply a vehicle to getting the room EQ functionality to work.
In the end, I think, "know(ing) what it is," when it comes to REW is a function of how long you've been in the game playing with it. For fun, check out the history link on the REW home page to follow the change log to see how the software has evolved - again as Anand pointed out - to now really having very little to do with what the software is named. I think Danny's statement regarding a, "solution for room reflections," is likely just saying what was said in the video from the start - although REW (or fill in the blank with whatever your room EQ solution of choice may be) CAN do room EQ, using EQ to try to fix room acoustics (example being managing what happens as a result of room reflections) isn't going to be a great solution. That sentiment by no means, I think, is meant to suggest that REW as a measurement tool - rather than as a literal Room EQ Wizard - is not a great tool to use to help you figure out how to tackle in-room acoustics using physical means in-room.