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Aside from version comparison between two stored versions, I find it
pretty useful, including being able to access any previous version of a
document going back to .1 version.
However, here's something I REALLY like.
You can do a search for word or phrase across directories and subscribe
to that search. Then, when someone on the system either publishes a new
document or revises a document that complies with the stored search, you
get an email notification with a link to that document.
I have stored searches for all my project names. Every time a document
is added or modified, I'm notified, keeps me from getting caught
off-guard when a spec or requirement is added or changed.
1. Multiple versions of your document at your disposal,
which allows you to back up to a prior version should
the need arise. (Like when you open your Word document
the day before deadline and it's hopelessly corrupted.)
Also, you have a record of when you added or deleted a
feature description, etc.
2. File storage in a system that is guaranteed to be backed
up on a regular basis.
3. Mechanisms that allow only one person to edit documents
and store new versions at a time (preventing accidental
loss of work because two people are working on a file at
the same time.
