The reaction of vendors, both software and services, as well as consultancies and business users to the possibilities that an IBOR offers suggests that this may be so.
An IBOR gives organizations one view of their investment data and enables them to benefit from a single source of truth regarding their investment activity.
This traditional approach requires too much time and effort to update and keep in sync and an investment in IBOR may be well worth the implementation and design cost.
In my experience it tends to be larger buy-side firms that are talking the most about IBOR, especially those with global offices or multiple investment accounting systems.