Elastic (the company behind Elasticsearch) provides an AWS based SaaS Elasticsearch product https://www.elastic.co/cloud/as-a-service with a very sane version policy[2] that keeps pace with the latest Elasticsearch releases.
Disclaimer, I work for Elastic
1. https://aws.amazon.com/elasticsearch-service/faqs/
2. https://www.elastic.co/guide/en/cloud/current/version-policy...