I really dislike that they make no distinction about what is and isn't an X-Pack feature in those release notes:
"Data Streams sounds cool! It could help alleviate some of the management overhead that I was accomplishing with ingest pipelines."
clicks into the docs
`X-Pack only`
I get that it's complementary to their ILM functionality, which, too, is an X-Pack feature, but still, clarity would be helpful.