There was clearly a non-trivial amount of frontend development work necessary to build the dynamic visualization in this article. This has nothing to do with CMS's. The work has nothing to do with persisting data anywhere. It has nothing to do with backend anything. It's all frontend work to get a visualization in a browser. Absolutely nothing do with CMS's.
Just open this (gift) article: https://www.nytimes.com/interactive/2024/01/09/opinion/immig...
There was clearly a non-trivial amount of frontend development work necessary to build the dynamic visualization in this article. This has nothing to do with CMS's. The work has nothing to do with persisting data anywhere. It has nothing to do with backend anything. It's all frontend work to get a visualization in a browser. Absolutely nothing do with CMS's.