Full disclosure: This is my tool that I'm using to generate the insights. When OpenSearch was announced, I shared some insights into how both Elasticsearch and OpenSearch were evolving, and I'll share some more up to date insights here. Looking at recent pull request activity, OpenSearch had 52 contributors https://oss.gitsense.com/insights/github?q=pull-age%3A%3C%3D... while Elasticsearch had 181 https://oss.gitsens…
https://github.com/elastic/elasticsearch/graphs/contributors
https://github.com/opensearch-project/OpenSearch/graphs/cont...
Over an order of magnitude more development on Elasticsearch than OpenSearch since that fork