I got a theory about that. Somewhere along the way our IDEs and code editors trained us that different languages always belong in different files. Eventually pe

I got a theory about that. Somewhere along the way our IDEs and code editors trained us that different languages always belong in different files. Eventually people saw this as an aesthetically tidy arrangement to strive for. Mixing bits of different languages "inline" within the same file got a bad rap despite the fact it was often a sensible approach to organizing common logic together. You write html inside js? or sql inside python? omg noob! Ironically I think our tools have programmed us to think/operate in a specific fashion that was convenient for IDE .