I know of a company (Simcorp) that uses APL extensively. It is probably pretty rare that they hire someone who is already a proficient APL programmer, and most

I know of a company (Simcorp) that uses APL extensively. It is probably pretty rare that they hire someone who is already a proficient APL programmer, and most of their hires probably don't know it at all. So they train them. It's not that hard to learn. Also, most of the APL programmers are experts in some other domain, usually finance, so they don't have too many preconceptions of what programming is like.