Paul McCartney said he avoided solos after his first performance with John Lennon, and Ringo Starr avoided them for his entire time with The Beatles. Lengthy instrumental solos aren’t necessarily a fundamental part of The Beatles’ sound, perhaps because half the members didn’t like them. The reasons they wanted to avoid solos were different, though.

Paul McCartney and Ringo Starr wanted to avoid solos
When McCartney joined Lennon’s band, the Quarry Men, he had a chance to play a guitar solo during his first-ever performance with the band. He nailed the part during rehearsals but couldn’t get through it onstage.
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