Yeah, I see what you mean. The purple represents segwit. But, segwit wasn't implemented until after the Bitcoin Cash forked. I think it was implying that segwit had been deteremined prior to the fork so Bitcoin Cash forked away to avoid segwit. I still think it demonstrates that Bitcoin Cash is a continuation of legacy blockchain. While Bitcoin LS did a softfork. A softfork is really worse. It takes the whole chain with it and most users have no choice in it. They should have done a hard fork for segwit if they really believed so strongly in it. And, left Bitcoin alone. That would have kept this from being confusing to people.