In my experience this is mostly relevant to people writing benchmark blog posts. Certainly not entirely, but I've worked on a few apps that would easily be cons

In my experience this is mostly relevant to people writing benchmark blog posts. Certainly not entirely, but I've worked on a few apps that would easily be considered "at scale" and 99% of the time, speed issues with the language itself are dwarfed by database performance and issues with the code written in that language.