Yes, niche, as in not in the top 50 in Tiobe index, as in less than 25k people on the Elixir subreddit, as in around 1000 jobs in the whole of the U.S which is a fraction of the popular stacks.
Niche. No matter which measurement I go with Elixir isn't anywhere near the top 20. The third one (spectrum) is actually a combination of 11 measurement metrics, so before you yell at me that Elixir devs don't use Stackoverflow - Elixir isn't niche only on Stackoverflow. It's just niche, period.
https://redmonk.com/sogrady/2021/08/05/language-rankings-6-2... https://www.tiobe.com/tiobe-index/ https://spectrum.ieee.org/top-programming-languages/