In MMA it's hard to say. Rubber guarding rampage jackson will get your spine broken on the floor, though you usually don't have this problem if you're not fighting a monster. I agree it's the most MMA adapted, and the most legit system in any fight. I would even go as far as to say the 10th planet system is the best advanced system in Jiu Jitsu, though top level guys will always stress how important it is to have basics down tight. Most grappling matches aren't won with pentagram chokes and locoplatas, it's usually rear nakeds, kimuras, triangles, the stuff you learn on day 1.
Best example being Eddie VS Royler. Used what has become 10th planet to set up a simple triangle.