> Fast paths, caches, retries, failover, load balancing, and autoscaling all make the failure state less resource-efficient relative to the normal state, which makes the feedback loop worse. Beware of very high cache hit rates!

This scares me as someone who is working on performance tuning and is adding fast paths every other day....

The paper kinds of reminded me the "Gray failure" paper by the way.

https://blog.acolyer.org/2017/06/15/gray-failure-the-achille...