The question is why they chose Python for apparently performance sensitive problems in the first place. The fact that they're now bumping against a performance wall and can't get around it by rewriting is a huge drawback when choosing Python as the language in the first place.
Awareness that organisations often end up in these problems should be considered when choosing the language for a green field project.
Awareness that organisations often end up in these problems should be considered when choosing the language for a green field project.