alt Hacker NewsIt's sort of about your skills, if you are better at NoSQL then use that. But it doesn't mean that your experience is universal.
Relational databases are incredibly flexible even if you have a NoSQL mindset, you can do data modelling like that in Postgres too with jsonb data types.
Yes and for crud systems relational is fine because you're unlikely to over-complicated your architecture. But when a system starts talking to other systems and its bounded contexts become complex, alternate solutions should be sought.
The problem with "schema change", and I did this for decades, is that it's always a massive blocker. In some companies the data architects had to approve and implement schema changes. You could wait days for that. NoSQL allows you to modify the document surface in mostly non-breaking change ways OR it's easier to version your APIs to handle different document versions.
Simple CRUD: Any data store is fine. Complex multiple bounded contexts: Choose the appropriate data store for each bounded context accordingly.
My point was no one should be reaching for a relational database or starting with an ERD to build a system. Document behaviors. Model the system. Let the system decide what data storage it requires.