At which point will they add their proprietary extensions? Am I the only one fearing this? I wouldn't want to depend on a business like Amazon.
What? OpenJDK is GPL with a class path exception, so software that runs on it can be licensed however but additions/changes to OpenJDK cannot be kept proprietary. Can you please elaborate what you're afraid of there? It's not as if Amazon is the copyright holder and can thus even offer a dual license.