What are the differences in features between Websphere Liberty Core, Websphere Liberty Base and Open Liberty versions?
Apart from the Websphere Liberty ones requiring a license, of course and Open Liberty being the 'upstream' open-source project, of course.
Do Websphere Liberty Core and Websphere Liberty Base require different licenses? I found some comparative graphs showing that Core equals roughly to web-profile (so, no MDBs or JCA, for example) while Base equals to full-profile (and there is also ND with collective support), but they seem a bit outdated.
Does OpenLiberty currently include all the features available in Core / Base / ND but without commercial support?
As to your question about WebSphere Liberty Core and Base, the information you found is not outdated. It is quite accurate. There has not been changes in that area in how Liberty features are divided up between Core and Base. You can see more details in the Liberty "periodic table" that is included on slide 32 here
Regarding Open Liberty, it does NOT include ALL of the features that are available in WebSphere Liberty Core, Base and ND. For instance, none of the ND features are available with Open Liberty. There are other WebSphere Liberty specific value-add features that are not in Open Liberty that are more legacy features that were purposely chosen not to be in Open Liberty since they are not strategic features or have been stabilized, for instance. Additionally, there are value-add features that were decided to require commercial support and not made available as open source. Another key difference is that WebSphere Liberty includes EE6 Web Profile features, where Open Liberty only includes EE7 features and above. When Open Liberty was created 5 years ago, there was little value seen in having the EE 6 Web Profile features be part of Open Liberty since EE 7 and EE 8 had been available for so long and most customers would be at those levels if they wanted to use Liberty or if they wanted any of the full profile features.
I hope that helps answer your questions.