Are there any advantages to using a book vs sections in an InDesign file/job other than to:

• limit the file size (making a large document less unwieldy)
• to join disparate documents that need to be combined in to one

Wondering if there are other advantages that I'm not seeing. (This file/job is being worked on by a single individual).

TIA

Edit to clarify: I have a long, rigidly formatted Word document with a number of distinct sections. I'm wondering if there's any reason to not just drop them in as one document, then create sections (and apply footers, runners etc) vs a book. I'm relatively new to ID and have used it in the past mostly for short 1-3 page docs.

Sections will occasionally be appended to (but only at the end of each section)