It solely is improving on efficiency. While it is extremely valuable given the disproportionate (to value) costs of these things, your statement almost sounds like it has improved an even more challenging aspect, pushing performance.
It's a generic comment that I don't think is even specifically about Kimi Linear or this submission, you could leave the same comment on almost any AI/ML submission and it'd say the same amount and be as relevant/irrelevant.
Agreed it would apply to any method or system that improved on efficiency.
It doesn't diminish the feat. Not trying to minimize the impact of Kimi linear's gain. It is a novel and outstanding benefit applicable to LLMs.