Eg. in the heavily regulated airline industry, Framemaker still persists as standard. Changes are typically made against a PDF as comments (handwritten or PDF annotations), attached to a paper "Manual Change Request" form and signed by manual owner and passed to a Tech Writer to replicate the change in Framemaker. Turnarounds in order of months are incurred, and where the regulator is involved, I have seen years.
A Git-style version control workflow would work well: - allowing collaboration - change documentation and approval is built in (even better if regulator can use it) - publishing smaller amendments while larger ones develop - reuse modules across manuals (eg. org charts)
However, uptake will occur when the learning curve is reduced...such as a well designed web UI
Another question (which I don't know the answer to) is how many developers had never used version control until they were introduced to Github?
I bet there are some seriously big interaction improvements you can make to the average enterprise "collaboration" software.