"Customers never leave: Enterprise software is like the Hotel California - You can never leave. Once a large company has gotten stuck into a complex accounting system like SAP or Oracle the sheer institutional inertia and hassle to involved in ripping it out, junking the historical investment, and retraining everyone makes it virtually impossible to switch suppliers."
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Please review the linked page for context.
If you can think of something better than this,
please add it to the database