Expressing a better algorithm, or getting optimizations for free is clear win. What’s not clear is why these languages should expose more low level performanc

Expressing a better algorithm, or getting optimizations for free is clear win. What’s not clear is why these languages should expose more low level performance tuning - such as multithreaded python. This removes invariants which make the language friendly, so that experts can squeeze out a constant speed up factor which is already an order of magnitude off from the proper tool.