I'm not sure whether this is an artefact of translation, but things like this don't inspire confidence:

> The "Modern Data Stack" (MDS) is a hot concept in data engineering in recent years, referring to a cloud-native, modular, decoupled combination of data infrastructure

https://github.com/datascale-ai/data_engineering_book/blob/m...

Later parts are better and more to the point though: https://github.com/datascale-ai/data_engineering_book/blob/m...

Edit: perhaps I judged to early. The RAG sections isn't bad either: https://github.com/datascale-ai/data_engineering_book/blob/m...