I think that JavaScript and Python, from my experience, certainly increase speed... but that definitely != productivity.
If you want to get something up and running fast, then JS/Python should absolutely be your go-to. We have an "innovation sprint" every quarter where everyone gets to try out changes and new features and anything else they wish to hack with our system, and I would say 99% of people choose to do this work in JS/Python.
However, my personal opinion is that productivity's first and most important pillar should be maintainability, followed closely by readability, with speed relatively far behind.
Again, this is just my two cents, but I equate Python or JavaScript to sending a message without things like capitalization and punctuation. Works perfectly fine for Slack, but not as well for writing a novel.
If you want to get something up and running fast, then JS/Python should absolutely be your go-to. We have an "innovation sprint" every quarter where everyone gets to try out changes and new features and anything else they wish to hack with our system, and I would say 99% of people choose to do this work in JS/Python.
However, my personal opinion is that productivity's first and most important pillar should be maintainability, followed closely by readability, with speed relatively far behind.
Again, this is just my two cents, but I equate Python or JavaScript to sending a message without things like capitalization and punctuation. Works perfectly fine for Slack, but not as well for writing a novel.