This is even more impressive when you know that S3 processes over 100,000,000 requests per second. Light travels less than 10 feet in the time between requests arriving at S3.

On 1 Dec 2020, AWS S3 announced that all writes to S3 are now strongly consistent (not eventually consistent, like before) *at no price change or latency changes* to any customers. Pulling this off was probably one of the biggest invisible engineering achievements of the decade