Complex sentence: For example, Led Zeppelin was largely written off by "Rolling Stone" magazine critics during the band's most active years in the 1970s, but by 2006, a cover story on Led Zeppelin honored them as "the Heaviest Band of All Time".
Split into simpler sentences: For example, Led Zeppelin was largely written off by "Rolling Stone" magazine critics during the band's most active years in the 1970s. However by 2006, a cover story on Led Zeppelin honored them as "the Heaviest Band of All Time".