Led Zeppelin had an incredible run during the late 1960s and 1970s. After the band split, each member had to figure out what to do next. Lead singer Robert Plant started a solo career and did find success. However, he had previously stated he had little interest in any solo projects before the band ended.
Robert Plant didn’t want to do any projects without Led Zeppelin

In the 1970s, Robert Plant became one of the world’s biggest rockstars thanks to the success of Led Zeppelin. Due to his stardom, Plant could have done solo projects and achieved success just by riding on the success of his band. However, the singer never did so because he knew how essential the other members were to his success.
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