>>>>> "D" == David Carlisle <[log in to unmask]> writes:
D> 2) To speed up processing of drafts as only the `current
D> chapter' need be processed.
It's perhaps fine in "drafts" to accept the presence of incorrect .aux
file information, especially if this facilitates speed. But I would
add reason 2A) for using \include: To produce a partial document
that is identical to part of the whole document. I think there are a
lot of applications where this is a common need.
Of course you can always produce the entire thing and whittle it down,
e.g. with "dvips -pp 20-33" but that is an extra-LaTeX solution.