Announcing two new packages: reactive fields and computed fields. Reactive fields have in my opinion a nicer syntax for reactive vars, no need for .get and .set anymore, you just call the function field() or set it to new value by passing an argument field(newValue).
Computed field allow you to wrap a computation in a way to prevent unnecessary reactivity propagation, because reactivity propagates only when the result of a computation changes, not if internal dependencies change. The good thing is that despite using autorun internally, it cleans itself up automatically when not needed/used anymore.