https://beepb00p.xyz/unnecessary-db.html
Although it would be nice to have one big database holding all my data, in practice it seems impossible. It is quite a pain to try to unify everything inside a relational DB.
The author argue that what is better is to parse the data rather than trying to normalize it. For example, if you have some data in JSON or XML, keep it this way and write a parser for it.
It's a bit like Communicating with Aliens, you use translators to transform from one format to another.