Yup. The other axis is "do they dogfood?" meaning "if I go to amazon.com is the service used?" The services Amazon built for themselves - s3, rds, ec2, dynamo

Yup. The other axis is "do they dogfood?" meaning "if I go to amazon.com is the service used?" The services Amazon built for themselves - s3, rds, ec2, dynamo, ... are generally pretty good. Redshift and glue? Not so much.