I'm not sure if you're being obtuse. But rewriting your stack in a language no one on the team knows because someone on HN said it's a better fit for your useca

I'm not sure if you're being obtuse. But rewriting your stack in a language no one on the team knows because someone on HN said it's a better fit for your usecase is something no good engineers/managers would think is a good idea. If a potential hire thought that was a reasonable thing to do, that would be a major red flag - a sign this person lacks experience, and any kind of business understanding.