[AnimalMuppet]

There's a real point hiding in the article, and not quite stated explicitly: If a language (call it X) exists and is widely used, because it's really useful for certain things, and another language (Y, say) comes along, then for Y to replace X, Y has to be significantly better than X at the things that X is good at. Otherwise Y gets viewed as "kind of interesting, but not worth the investment to make the jump", and languishes in obscurity.