> the fact that its name is the same as that of a primitive in functional reactive programming, as in rxjs, with which it has nothing to do, doesn't help either

> the fact that its name is the same as that of a primitive in functional reactive programming, as in rxjs, with which it has nothing to do, doesn't help either It's based on reactive programming though. Cells observe the entities mentioned in them and update accordingly when they change, which is why you can have imports at the bottom, and you don't have to care about cell evaluation order as with Jupyter Notebooks.