Interesting read. They say the devil is in the details.
Watching video of one of David's albums in the making. They had the drum kit set up in his untreated garage and it was giving the engineer a run for his money to get it recorded. When I seen that I have wondered if maybe they resorted to drum replacement . I didn't see how they could have captured a good take.They went to Pro Tools with those takes, so it appeared to me original analog kind of took a back seat to production demands early on.
Add to that mastering similar to what happened with Metallica and I also see very little return on efforts to capture a true analog album. Of course Grohl is Grohl and he sold albums regardless. Like Bono, he can afford to be eccentric in his methodology and still make a huge profit.