[mafribe]

    Compilers are sexy, but they're very much a solved problem.

This may be true for sequential languages, but is very much false for the compilation of concurrency and parallelism. It's basically not known how to do this well. Part of the problem is that CPU architectures with parallel features have not yet stabilised.

For sequential languages the problem has shifted: how can I get a performant compiler easily. The most interesting answer to this question is PyPy's meta-tracing, and that's work is from 2009, and far from played out.