That’s a really big “if”. In my experience, most application engineers aren’t very good at SQL because they don’t have to be; most apps just don't ever reach a

That’s a really big “if”. In my experience, most application engineers aren’t very good at SQL because they don’t have to be; most apps just don't ever reach a scale where it matters, and something like Rails or Django with N+1 queries all over the place performs just fine.