Only if you label basically everything as "legacy", which is really stretching the definition. Just because someone invented a New Thing, doesn't mean all the O

Only if you label basically everything as "legacy", which is really stretching the definition. Just because someone invented a New Thing, doesn't mean all the Other Things are suddenly "legacy" overnight. Fact is, PyPy may be "fast", but in science CPython is in effect much faster because you can use the massive and optimised scientific stack including python, pandas, hdf5, etc etc