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A lot of good answers, but my bet is the third party plug-ins. Does librecalc have SAP Analysis, or the other plug-ins to connect excel to the accounting systems?
SAP is some kind of communicable brain cancer. My company (has factories in over a dozen countries) has been trying to implement it for almost 10 years now. A 5 min job now takes 30min because of all the paperwork that has to go along with it.
SAP stands for Slow Arduous Process.