Because it's further evidence for the "unreasonable effectiveness of transformers", i.e. that transformers are a fully-general approach for all kinds of learnin

Because it's further evidence for the "unreasonable effectiveness of transformers", i.e. that transformers are a fully-general approach for all kinds of learning tasks, not just next-token prediction. Obviously there is a strong and a weak version of that hypothesis and the strong version is probably not true, but to the extent that we appear to be honing in Nature's "one true way" to learn how to accomplish a task, that seems like important news.