> Do we have example of big companies porting their whole codebase to
> another language ?

Yes, of course. Companies modernise all the time. We have a client who just
started porting 1MLOC of C++ to F#. Flying Frog have ported hundreds of
thousands of lines of OCaml to F#. It happens all the time but it is even
more likely to happen as a consequence of multicore.

Cheers,
Jon.