While I appreciate FP using terminology from its math origins - I do think it's a huge barrier for entry, and not really sure languages that cling onto them, will see much real mainstream success.
But then again, I don't think the language maintainers et. al. are too concerned with widespread success. Just some observations, but the majority of people I know that actively use FP languages, are academics. I've encountered some companies that have actively gone with a FP language for their main one - but some have reverted, I guess due to the difficulty of hiring.
With that said - functional elements are becoming more common in widespread languages, but not all the way.
But then again, I don't think the language maintainers et. al. are too concerned with widespread success. Just some observations, but the majority of people I know that actively use FP languages, are academics. I've encountered some companies that have actively gone with a FP language for their main one - but some have reverted, I guess due to the difficulty of hiring.
With that said - functional elements are becoming more common in widespread languages, but not all the way.