Thanks for sharing that.
Yep, squirming a bit at the 'sausage factory' aspect of some of this.
For me, often great music is stuff that is giving you a little window into the soul of the writer. That must get dissipated when there are 9 people involved in it.
Then again, some of the colabs that come out of this forum are awesome, and you can see what each person brought to it. So I don't think multiple writers is bad per se... I guess Lennon & McCartney would have agreed. I just don't much like the idea of "jobbing chorus writers" being parachuted in to write a hook then disappear!