Sadly it is very difficult for a hospital to migrate off an electronic healthcare record (EHR) to a rival product. The main alternative is EPIC, and that would be a “frying pan to fire” alternative. I have used Cerner in the past, and still use EPIC now.
The data is locked away in a proprietary format (done somewhat deliberately) and changing product often involves running both EHRs in parallel with new data entered in the new EHR and the old one run to access previous data for a patient.
An Integration Engine can decrease some of the human user burden (for doctor, nurse etc) to have to load both products to look at a patient’s health record for old and new information. Either way, costs increase over sticking with just the one product.