C/C++ because C is turning 50 years old soon which means there's 50 years worth of libraries to use in your projects, and C++ because it's more flexible & 'meta' C, imo.
Languages that really flex their type/category theory muscles (Haskell et al come to mind) also, because I think the best of the next 50 years may have such languages as the origin point for the propagation of insanely good ideas to all the other ones.
Languages that really flex their type/category theory muscles (Haskell et al come to mind) also, because I think the best of the next 50 years may have such languages as the origin point for the propagation of insanely good ideas to all the other ones.