The Node.js 8.9 will remain in Active LTS until April 2019 after that it will enter the Maintenance LTS status. During the maintenance time, only critical bugs and security bug fixes are allowed. Hence, the important bug fixes will be available for 8.x until December 2019. The status of LTS will be lost after that.
If you look at the Node.js version 8.9, it ships with version 6.1 of Google's V8 JavaScript Engine and updates
The developers have already announced that the version 9 is only suitable for testing and not for production purposes. The main purpose of the new version is to integrate a unique code with all errors thrown by Node.js. The end result is that it will enable error messages to be modified without any breaks.
If you would like to work with the AWS Lambda or Azure Functions, you should wait or sometimes because version 8.X doesn't provide support for these cloud platforms.