Yep. Let's imaging I'm a convert. I'm working for a software company that writes software for corporate clients. If I come to my client and tell them, okay, we are going to do your new customer handling system in APL, I'll be laughed at, because they probably never heard of the thing. Likewise If I try to get APL people hired I'll be laughed at by my superiors because they won't see as sutainable.