In EC2 Auto Scaling, AWS recommends you use a launch template instead of a launch configuration

Explanation

Another way to define what Amazon EC2 Auto Scaling needs to scale is by using a launch configuration. It’s similar to the launch template, but you cannot use a previously created launch configuration as a template. You cannot create a launch configuration from an existing Amazon EC2 instance. For these reasons, and to ensure that you get the latest features from Amazon EC2, AWS recommends you use a launch template instead of a launch configuration.