Too late. We just deployed a new project with OpenSearch after learning from an Elastic salesperson that their licensing fees would eat up significant portions of the projects profits. Also, since it's not spelled out clearly, I'm supposing huge parts of vital functionality are still subject to a paid license, even if the core functionality is technically open source now.
Plus they lost all trust now. Who's to say they won't pull the same thing again if developers were to come back? It's not like they stopped requiring a CLA...
To be fair, though, every project of a certain size requires you to sign away your rights via CLA, so I don't think that can be held against them. (Though I admit, dispensing with a CLA would be an amazing gesture of good will.)
Bit hard to trust - plus OpenSearch would continue to go strong because lot many companies have built business on top of it. Most of the centralised logging providers come to mind.
Grafana and Elasticsearch with their AGPL, are not deployable for teams that don't even want to provide a competing service because even basic security features (group membership via external OAuth source for example) are only available in Enterprise Edition (TM)
