I've used a reactive model on the front-end for several years now (MobX at one job and then RxJS at another) and haven't encountered anything I would call "Obse

I've used a reactive model on the front-end for several years now (MobX at one job and then RxJS at another) and haven't encountered anything I would call "Observable Hell". I will admit that cascading side-effects can be hard to debug, but they're also a code smell. The whole point of the reactive pattern, IMO, is allowing you to have as few open-ended side-effects as possible. i.e., reactions that change state (instead of re-computing a pure function) should be scrutinized heavily and kept to a minimum. If they're kept to a minimum, then in my experience they remain manageable and fairly easy to reason about.