In 1995 the surviving three Beatles recorded “Real Love“, a song that Lennon had written and recorded in 1979. They used his vocal takes on the new recording and sang harmony with him. McCartney played a vintage double bass once owned by Bill Black who played the bass in Elvis’s original mid-1950s trio.
This choice of instrument is what archaeologists call symbolic re-use. It’s when runestones are found built into the walls of later churches. Or when Napoleon’s imperial coronation outfit referenced designs from the tomb of Childeric I. People reach back in time to take part of the essence of great ancestors.
“Real Love” is a pretty decent Beatles song, certainly not one of their weakest outings.