Interesting comments, but I must take exception to some:
1). When I've done RF videos, I made sure that one ransomware file was not running prior to the next being initiated. So as long as a number of ransomware files are not running concurrently, I fail to see the issue.
2). You seem to accept that in some cases a few Documents can be encrypted prior to the Protection Mechanism being enforced. If those few encrypted files happen to be the most important files one has this could be a problem. Also it makes RF more of a Kinda-Sorta ransomware protective application then a Universal solution (which I am sure that you are striving for). As I'm more of an Absolute Protection girl, I hope you can see my problem with it.
But that being said, I'm sure a test can be constructed meeting your requirements (perhaps this weekend).