The thing that makes EMRs actually hard to pull off is that each hospital wants to implement its own workflow. So EMRs are less off the shelf software and more

The thing that makes EMRs actually hard to pull off is that each hospital wants to implement its own workflow. So EMRs are less off the shelf software and more a toolkit that an army of implementers can use to encode a hospitals workflow into software. I don't have any experience with EPIC but got to watch a slow motion train wreck that was a Cerner implementation. Every department wanted everything customized just the way it wanted and there wasn't any introspection into if what they were doing was even the "right" or best way. The problems with EMRs are really just a symptom of a real problem in medicine which that every department head wants to do things their own way. And there isn't really a good way of selecting which is best amongst the various processes/methods. The more prestigious the institution the larger this problem typically is.