There are still proprietary modules only available under the Elastic License just as before.
However it seems that they will be moving the free modules which were previously only licensed under Elastic License to be licensed under SSPL instead.
You're right -- it's only the free "X-pack Basic" code that will now be available under SSPL. But that does mean that all Elasticsearch distributions will now include the former "X-pack Basic" features.
That seems to be what they are suggesting by making the "free" box in the 3rd column span both the "free" and "free/basic" tiers of the previous columns.
Unless they plan to make those modules paid which were previously free, which I doubt
However it seems that they will be moving the free modules which were previously only licensed under Elastic License to be licensed under SSPL instead.
At least, that is what this graph seems to be indicating to me. https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce...