I would hate for the book to fall into the hands of manager who does not know perl and blindly dictates that the whole book will become the company coding standard.
Never had a manager who thought there was a benefit of enforcing coding styles, but I've met many coworkers who started suggesting coding styles. Most of them, they say "perhaps we should start with PBP". Those people can be easily countered: if you have converted all your OO classes to use Class::Std, come back and we'll continue the discussion". I'm still waiting for the first person to do so.
PBP has some interesting arguments. But nowadays, I only use my copy of PBP to whack people who defend their style with "but PBP says so" over their head. My copy is quite tattered and bloody, as I'm not afraid to use it.