oh for sure, but for Python/R the barrier to speed isn't any of their important productivity features (as far as I know) but just a high quality compiler/JIT I

oh for sure, but for Python/R the barrier to speed isn't any of their important productivity features (as far as I know) but just a high quality compiler/JIT If I was Lord Of Computing I wouldn't let languages out of beta until they had a high quality compiler or JIT. Turns out I am not though.