I suspect it already is in use in Lambda, an AWS rep mentioned something about them using a custom JVM internally for Lambdas when they gave a talk at our compa

I suspect it already is in use in Lambda, an AWS rep mentioned something about them using a custom JVM internally for Lambdas when they gave a talk at our company recently, so this is probably that. As for the default on AMIs, it probably will go that way when OpenJDK 8 support ends next year. They'll have the option of distributing RedHat's OpenJDK build with their patches, or packaging their own. It'll probably be similar to the `mysql` package actually providing MariaDB, and no one will really notice. I am intrigued if there will be noticable performance improvements. They do mention performance enhancements on the page, but I believe this is more about dealing with Oracle's licensing changes and maintaining support for the LTS releases. But there's plenty of incentive for them to make it better performing than alternatives too. I expect my company will switch to this because we're already on Amazon Linux 2, and have been struggling to make a decision on how to update the JDK with future releases. But if there are performance improvements, that might push some more AWS users to switch to Amazon Linux over Ubuntu and other distros in EC2.