I am suggesting the Magento team creates their own solution that is an alternative to MySQL & ElasticSearch. Elasticsearch is complicated to setup, and customers must pay for "Gold" or "Platinum" service levels to enable security for it....
If the Magento team creates their own implementation then it can be setup with ease like most other core modules... The search data can be loaded into memory and refreshed with cron jobs.
ElasticSearch is very frustrating. Why is MySQL searching being deprecated?