The biggest advantage of SQL is that it's so common that if you deal with data a lot you tend to know it well enough. Sure, there are small differences between

The biggest advantage of SQL is that it's so common that if you deal with data a lot you tend to know it well enough. Sure, there are small differences between databases but joins/grouping/window functions tend to work similarly enough. On the other hand, when I have to do a somewhat complex query in Elasticsearch, or MongoDB, or gorm, or Django ORM, I have to check each time in the docs how it's done.