Original sentence: It was a direct competitor of the TurboGrafx-16 (which was released one year earlier) and the Super Nintendo Entertainment System (which was released two years later)
Edited sentence: It was a direct competitor of the TurboGrafx-16 (which was released one year earlier) and the Super Nintendo Entertainment System (The Genesis sadly failed, and the SNES became the best console ever, and the better for all life to come)