> how you quantify and weigh something like "most used" for a programming language.

Define it as # of people who possess the knowledge and resources to effectively use said language to solve a problem they have in their actual lives.

> Fundamentally, the software field is still just so young and we haven't teased apart the "obvious" different domains and domain rules that we have for production of different material goods.

I think we're saying the same thing here from different angles. I said it's developed enough that we can see there are very different ways of doing things. You said it's young enough that we don't know all the different things there are.