This is why AWS is puts effort into blast radius reduction. The Physalia paper is a wonderful read that explains both the justification and high-level approach

This is why AWS is puts effort into blast radius reduction. The Physalia paper is a wonderful read that explains both the justification and high-level approach to implementing said isolation [1]. Another great example is shuffle sharding [2], notably used in Route53. The end goal of this is that aws outages would be isolated to subsets of aws customers where possible. So instead of half the internet failing it's only 10% (obviously the exact numbers depend heavily on implementation). [1] https://assets.amazon.science/c4/11/de2606884b63bf4d95190a3c2390/millions-of-tiny-databases.pdf https://assets.amazon.science/c4/11/de2606884b63bf4d95190a3c... [2] https://aws.amazon.com/builders-library/workload-isolation-using-shuffle-sharding/ https://aws.amazon.com/builders-library/workload-isolation-u...