Simplify the following text for a Grade 6 native English-speaking person.
Original: Many of the most well-known fusion artists were members of earlier jazz fusion groups , and some of the fusion `` giants '' of the 1970s kept working in the genre .
Simplified: This new style of pop fusion was softer and slower than fusion from the early 1970s . Pop fusion was played a lot more on the radio than the fusion from the early 1970s .