I'm just not convinced that they should be solved by VCSs - I tend to think that the general issue of conflicting changes calls for a social/process solution, n

I'm just not convinced that they should be solved by VCSs - I tend to think that the general issue of conflicting changes calls for a social/process solution, not a technical one. Does the set of "lock/unlock/revoke" operations really add much over sending an email to a list or designated object owner saying "I need to update the Visio diagram"?