Ok but isn’t that true of all software development? It’s not like anybody’s done a rigorous test of writing their entire codebase in Python vs Java. It’s all vibes based there. People create post-hoc justifications for why they use certain technologies but the reality is a lot more vibes than anything else.
No, relative performance between Python and Java can absolutely be measured.
Yes, but performance is not the only factor in whether a specific language is better than another for a specific project.