FHIR is nice but doesn’t completely reduce the complexity of integrating the underlying data itself considering the mess that is HL7 and mess that occurred with

FHIR is nice but doesn’t completely reduce the complexity of integrating the underlying data itself considering the mess that is HL7 and mess that occurred with v3. The situation is sort of like moving from SOAP+XML Schemas to REST/JSON. Easier to develop, but the underlying data structures are still extremely complicated and tricky to get right. This is especially true when dealing with ancient systems written in niche languages/database hybrids (MUMPS comes to mind): https://en.m.wikipedia.org/wiki/MUMPS https://en.m.wikipedia.org/wiki/MUMPS