AWS provides a whole suite of tools that are critical to app dev, including user auth (cognito), support for maintaining data locally on a device and sync'ing to a database (appsync) and serverless database (dynamodb). They have many other mobile-app tools as well. Would be a big add to Expo ecosystem. We've successfully used these tools inside an Expo app already, but it would be great to have them exist as part of Expo as we had to spend a lot of time doing it and I guess others will as well.