Switch to another EMR due to a problem with V5 upgrade? Converting data would be more work than simply going back to V4.
I would recommend that you implement your backout procedure and get V4 working again. If you can install V5 on a test environment and duplicate the error, then you could let AC team troubleshoot the problem on that test AC instance vs. your production AC instance.
Having the latest and greatest version doesn't do much for your practice if you can't get it working dependably. Like Bert, we are still on a previous, more stable version (although he upgrades his production version faster than even I do). There is a lot to be said for being a follower on the IT side and often this is best practice. Let other people take the arrows and learn from them.
