I've always been curious why OpenEMR seemed to dominate in the OSS space after we walked away from it. I can only theorize that the code was more approachable than other projects (PHP), and that the GPL kept the work from being captured by any one business. I can't imagine that the code was the best, I'm painfully aware of how poor the security practices must have been in hindsight.
You've given me the chance to ask a question I never knew who to ask: Why, back in 2003 (just after we stopped giving the project attention), was OpenEMR the project you decided to spend time on? What made it the attractive thing to invest in?
If you can tell me I'll bottle that elixir and pour it into every OSS effort I work on today.