Trying to come up with a reply made me realize something. I was initially going to write something like "it's just not ready yet" but paused for a moment and reflected on that. That's actually not a real reason why it would come short of that. And instead of talking about how something "is not quite ready yet" we can instead choose to invest into it and use it anyway, with the goal of contributing and helping make it "ready" and more widely used.

Out of everything mentioned, I think Gleam is the most likely to succeed and what I think I will invest in as well. But that's not just because of the language design but rather because of their approach to community and community building! It's a very very nice extra that the language/syntax also happen to be what I like and have described in my previous comment.