There are a lot of features that people don't know about because they haven't been playing for the full 10 years to see as things change. I personally knew about this one, but I know for sure that there are a ton of things that I don't know about SF capabilities. and other things of course.
The number of R5 SF is indeed very, very rare.
I would love to see an army of nothing but these, deploying in the rearguard, and peppering everyone to death before they can get anywhere near.
