Generally it’s not recommended (by AWS) to use the built-in version of AWS SDK. For one, it’s pretty out of date, it doesn’t even support DynamoDB transactions.

For two, it can be updated without you taking any actions. It kills the whole immutable builds. So far I’ve not seen any adverse effect of this in Node.js functions, but not long ago Python functions were affected when the version of boto3 was updated, and the new version had a subtle bug. It affected a few people I know, and as you can image, it wasn’t easy to figure out where the issue was.