This article seems like a reaction to DuckDB's surge in popularity. Having multiple DB engines to choose from is good and it often doesn't matter which one you use. One could make the same argument about DuckDB. Many database engines are multi-purpose. Though of course there are specific use cases where a different DB may be more appropriate...

Anyway databases nowadays are a commodity. A sticky commodity but nonetheless they are replaceable; increasingly so in the age of AI where data migrations are easier than ever.