That is what the first sentence of the article is about and it is the premise of the entire article?
Ah, so it is! I got overexcited because I was one of the people who advocated for a racy cache during the redesign of that code back in the day.
Can I turn this off?
Then that implementation doesn't even save bandwidth (for client nor server), which is one of the purposes of having a cache in the first place (together with other reasons).
When the cache wins the network transfer is canceled, so it’s not as bad as you’re making it out to be.