I suppose if arrays language get popular enough, we will get a module to use them as a DSL for libs like numpy, just like we have regex for strings, instead of a whole language dedicated for them.

It would be a win / win, you gain the strength of J, K and APL for array processing, without the weakness of them for anything else.

And just like with regex, you'll get fat disclaimers in doc telling you to not get carried away too much as it can quickly become unreadable.