I couldn't agree more with Amazon. We build something on Elastic - and trying to work with them to get licensing was at best a major PITA. In ~2017 Elastic decided they wanted to go Enterprise Only. They started to charge $100k for x-pack, though one could get a dev license for $50K.

We quickly built a SQL parser for Elastic, an alerting engine, some other bits. These are all bits that just went poof yesterday when Amazon released opendistro - and I couldn't be happier. Sure we'll have to slice out a bunch of code, but at the end of the day it didn't have value to our core business.

I just wish Elastic as a company was easier to deal with. We'd be months ahead if not for them - and ultimately just worked around them. This is in spite of MY using Elastic for ~9 years now.