I wish there was more information like this out there. So fascinating to hear both his experiences and his opinions given that he was so closely involved with the recording evolution. It's just eye opening to hear how much these songs go through. Those of us who don't record hit records for a living are easily unaware of the labor and debates that go on behind the scenes. The band certainly doesn't just show up, record a song, and go home.
It's hard to imagine, for example, Paul coming in to record new drum tracks for a song that's already been recorded. Just doesn't sound like something that should work, especially if he's changing the groove. Wouldn't you need to then go back and re-record all the other instruments to match the new groove? Just fascinating stuff.