I was actually thinking about the gracies when I said that. And I think that we're saying the same thing, but I just want to clarify.
To me, the gracies are still historically valid, not modernly valid. It proves that, once upon a time (25 years ago), GJJ was a very effective system. That could because it's really an effective system, because people didn't know how to counteract it, or that they had some trick people hadn't figured out yet. In order for me to care if it's still valid, I would want it to be both historically valid (even just 5+ years ago), and modernly valid. The modern valid proves that it's effective right now, and the combination of modern and historical validity shows that it's not a one-trick pony, or that people just haven't gotten used to it yet. As long as 95% of techniques are still allowed, the rules shouldn't come into play, IMO.