>> All software is building on top of something. Every heard of system calls?

Yup, heard about them. My point is the focus of these "applications" is meshing API calls rather than algorithm and data structures.

>> May be you being such a great programmer can show us how to build a "real system", without ever using a API of anything ever.

I ain't a great programmer at all, far far away from that. As far as "real system" is concerned, what about IBM watson?

>> Something like 99.99% of the world does that. Erlang is not even in the list top 10 languages in the world today.

I wasn't talking about Erlang specifically. I was pointing to the so called niche languages that you mentioned that very few people uses.

Anyway, there is no point discussing this because we have different point of view. Mine is "what should be done to further progress computer science - the progress is too slow", yours being "lets build applications and earn some bucks".