Do you need a brand new language to solve that problem though? That sounds like something solved by a FaaS platform that exposes a database and other common primitives out of the box, of which plenty are popping up all over the place.

If we're talking about a front-end dev, they're probably using React, in ES/Typescript. Any backend product targeting these devs would be nuts to not start by offering a JS environment, I would think.

Hence why every FaaS thus far starts with a Node env.