I had given up on this thread thinking that I was the only one watching SX. I wonder how "measured" RD was? KR is a big talent so RD is likely riding near the edge but not willing to push the edge.
99% of bikes sold don't ever see an SX track and 450 four strokes are amazing machines so don't expect manufacturers to bring back two stroke dirt bikes. I had the opportunity/thrill to ride a 250 2s, 250 4s, 450 4s, 500 2s back to back. The 450 4s was the best bike, but since I'm old now, I would buy the 250 4s if I bought a new bike because it was more docile.