I never played with Swift, as its an Apple gimmick. I only read the wikipedia article right now, claiming its a compiled language. Are you able to inspect variables in a running systems, are you able to change the running code without restarting the system?

A few other examples come into mind, where immediate coding is of benefit.

First we have all those educational toy languages in the tradition of Logo, that are designed for children to learn the first steps in coding, that benefit for immediate execution.

Next we have the tools, that are often not considered as real programming environments, e.g. table calculation in Visi calc tration, and tools like matlab, mapple, maxima, axiom, or R.