There’s an excellent interview on the Exponential Audio web site with mixer Gary Lux.
We often joke that a mix is never finish just abondoned, Gary thinks not.
He says “People don’t finish, people can get something 95%, but you’ve got to finish. I tell people, if I didn’t finish a mix then I wouldn’t have a career”
As someone who has mixed for everyone from Sinatra to Sting, it’s worth a read.