Because these are real decisions that real engineers have to make all the time. Sticking to Ruby for familiarity and ease vs rewriting in a less friendly language for the sake of speed, efficiency, and control is a real tradeoff, and it’s an important decision.

Given that, I wish we saw more of these sorts of stories. I have my own tales along similar lines for multiple tools in my own company. In my case Ruby/Python/Bash vs Go/Rust. This keeps coming up so I question your thesis here that these things aren’t comparables.