Projects like Meili Search are already coming for Elastic Search's lunch: https://www.meilisearch.com. I think there is a market for fast, light weight alternatives like Meili that offers up a fully featured open source experience.

With Elastic Search many of the features, security being one, are locked away behind commercial licenses. With Meili it seems they are, for the time being anyway, going with a proper open source version. I understand Elastic needs to earn money, and I get their licensing model to accomplish this. But Meili will probably steal away a good portion of customers interested in self hosting their search solution.