I'm curious to know the need behind your request. I've heard this request a few times because setup can take some time to initialize a test station, making it a pain to iterate on a settings to test them (e.g. 10 seconds setup, stop, change setting, repeat).
Is that basically the same need you have? Would providing a way to keep some variables alive at edit time, so they don't need to be reinitialized every execution (or for interactive executions), solve this problem?