Clarifying the underlying concept is great. Self-style delegation gets to the heart of why "this" is dynamically bound in JavaScript, which is one of the language's most confusing features. Self-style delegation is also just generally cool and more people should know about it.
At the same time, getting hung up on terminology and trying to mandate a definition that goes against current usage just because it's older is a fool's errand and doesn't help.
Language is a social construct. It's very important for us to have consensus and agree on what words mean so that we can communicate efficiently. At the same time, there's nothing wrong about having definitions change over time.
"Car" used to mean a two-wheeled Celtic war chariot. It wouldn't be helpful to insist that it still mean that, and it's just mean to proclaim that everyone who uses "car" to mean "automobile" is wrong and doesn't understand the idea of war chariots.