Can’t speak for the poster who wrote the parent post, but we’ve just evicted the AWS Elasticsearch stack from our platform. For something simple, it was a resource hog, configured badly out of the box, complex in all the wrong places, and limited in its offering and linkages to other AWS resources. Just my 2 cents of course.

AWS is several versions behind, and only supports a limited number of plug-ins and does not allow custom plug-ins.