I think that’s as far as the grand scheme of a project goes, coding productivity is a myth.
Can a python or ruby dev bang out Advent of Code faster than I can in zig or rust? Sure. Is advent of code representative of a multi-year long business system where coding is 15% of the time cost at the high end? Nah.
When you look at the actual bills and where the actual time goes, spending time on optimizing the code pace of a MVP is simply not valuable. You’re saving a small percent of a small percent of time at the beginning to accept using languages that are not know for their steady state support ability.
Yep, agreed on all accounts. People simply love their languages and will point out any area they "win" at, even if it's inconsequential and not at all important. And that's happening a lot, including TechEmpower benchmarks, speed-to-first-MVP, and many others.
That's the only thing RoR wins at: speed of delivering first MVP.
Once you get into areas where companies don't die if they can't deliver a demo next week, RoR is not at all impressive or even consequential.