You were questioning the lack of popularity for MGLS. One reason is, like you suggested, the number of sequences. Over 100 cases is hard to accept to save 1-2 moves.
I don't often see MGLS mentioned either. It needs someone to frequently post fast videos for more people to use it. It's like all of these things I put on my site or post in Random Cubing Discussion. I think a few of my ideas have potential, but they aren't popular because I don't promote and I'm not an active video solver.