Dude, all of those other styles that remained mostly to pure TMA's, continued to lose *MOST* of the time for the next 30 years straight in the UFC and other MMA promotions.
What made UFC 1-4 incredibly interesting was that it put standup strikers vs. grapplers. Nobody wanted to see Karate vs. Karate, or KF vs Karate, etc. these joints have been done ad nauseam. I remember renting VHS tapes and wanting my style of TKD to win vs. Gracie. I was even hoping that Karate would beat him, failed. Was so happy to see Kimo (TKD) hurt him. But then I went to train BJJ. Kimo trained BJJ.
The first 3 years or so were the best time for any TMA style to prove themselves & dominate the MA world, but they all failed miserably (esp. when the Wrestlers started appearing). This is why MMA is so real; b/c real Fighters adjusted....even the Wrestlers & BJJ'ers started training Boxing & Muay Thai, etc.