“To be clear, I think McCartney performing major surgery on Lennon’s song makes the result a more authentic Beatles record, rather than less. Lennon and McCartney’s collaboration was often in the form of editing each other’s work, and sometimes extensively rewriting it (as when McCartney turned Lennon’s sad acoustic dirge about being unloved and uncared for as a child into “Yellow Submarine”) and what both men missed in their solo work was the ability of the other to find the core good idea among their bad ones and to polish it up for them and turn it into something workable. Both released plenty of fatuous solo work that could have been turned into classics with just a little bit of help from the other (as well as both releasing plenty of actual classics in their solo work)”