> In addition, Twitter will continue to use AWS services such as Amazon CloudFront (AWS’s fast content delivery network service that securely delivers data, videos, applications, and APIs with low latency and high transfer speeds to customers globally) and Amazon DynamoDB (AWS’s key-value database that delivers single-digit millisecond performance at any scale).
With respect to DynamoDB specifically, Twitter has its own custom distributed key-value store: https://blog.twitter.com/engineering/en_us/a/2014/manhattan-... that twitter.com itself runs on.
The latest on cloud hosting is from a week ago, and I'm guessing you don't have any more recent info than this:
https://www.reuters.com/technology/twitter-resumes-paying-go...