Earlier quoted context omitted.
TFA explains why Elasticsearch switching to SSPL is indeed a cause for concern. Money quotes: > Basically, it’s a hostile proprietary license masquerading in open source clothing. By using an SSPL project in your code, you are agreeing that if you provide an online service using that code then you will release not only that code but also the code for every supporting piece of software, all under the SSPL. > It’s not…
Here's the actual language from SSPL > If you make the functionality of the Program or a modified version available to third parties as a service... (license conditions apply) > “The Program” refers to any copyrightable work licensed under this License. IANAL, but that seems pretty cut and dry referring to making an Elasticsearch or Kibana service
> Making the functionality of the Program or modified version available to third parties as a service includes, without limitation, enabling third parties to interact with the functionality of the Program or modified version remotely through a computer network, offering a service the value of which entirely or primarily derives from the value of the Program or modified version, or offering a service that accomplishes for users the primary purpose of the Program or modified version.
From what I understand the big question is, where is the line on if value is derived primarily from "the Program", and what exactly constitutes modifying the program.