If you're building web apps chances are you want to see your changes frequently since modifying a model, controller action or view may yield a different UI state.
I'm constantly editing code then directing my attention to my browser to see the results. This is independent of CSS or JS changes that might be picked up by asset watching tools like esbuild or tailwind's CLI tool.
I usually only need to run it a few times towards the end of writing a feature to see if the compiler or specs catches any errors.