I suppose 'rewind' would mostly be useful for Javascript applications? But in Javascript you can already debug pretty well. It's been a while, but I suppose Javascript debuggers can drop frames, like debugging other languages, so you already have a kind of rewind?
Does anyone have a good example use case for this?
If your app is something that takes time to react on events to unroll, then this could save you lots of time. I made a music player and just by the nature of timed events it took quite a long time to catch edge cases I did not foresee in the prototyping phase.
Or even more mundane: accidentally hitting "Step over" twice in a row.
Example: https://stackoverflow.com/questions/2367816/when-using-the-j...
"Using the "Drop Frame" functionality you can "fall back" to a previous stack frame, in a sense going back in time."
This video has a good intro: https://www.youtube.com/watch?v=ytNlefY8PIE