I have hired elixir devs recently, even worse: onsite only, and couldn't help myself with all the applications. And it wasn't like when hiring JS devs that I had to weed out the majority of super-junior candidates first. All around the statement of "hard to find devs" doesn't hold anymore as it used to. Just as a data point. And from the community often a saying is that there aren't enough Elixir jobs to begin with, so thats another story.

Having said that, a single team of seasoned Elixir devs can achieve more/better things than 100 average devs using the usual SPA/API/microservices-JS hell with all that modern unneccessary complexity. Saying this as a former DevOps guy babysitting the mess of multiple of these teams before.