The Dag/graph is one of the best parts of those tool chains. That is one library I wish had a good open source equivalent. Partly because it would be nice to use in any project / environment, but also because there would be a lot more documentation and examples. Take Pandas for example, if it stayed internal then it wouldn’t be the powerhouse that it is today.

Most dependency graph examples are based around calculations but it’s a versatile pattern and not limited to just math. I find the JS community has really taken hold of the dependency tracking and “reactive framework” idea to build UIs.