Epic provides support for their implementation of the standard. Any person working in healthcare software, which I did for 15 years, knows that for every stand

Epic provides support for their implementation of the standard. Any person working in healthcare software, which I did for 15 years, knows that for every standard there is a myriad of vendor implementations, bugs, hacks, workarounds, and just saying "System A speaks FHIR and System B does too" does not mean you can just load an EHR dataset from A into B and have all the information usable.