I've seen components rewritten using observables to be sometimes a full 1/4 of the original size. The biggest thing for me is the realization of the "source of

I've seen components rewritten using observables to be sometimes a full 1/4 of the original size. The biggest thing for me is the realization of the "source of truth". With observables, if they are set up correctly, you can see the exact bits of information that some resultant stream are dependent upon. Operations then can have a single action because all of those sources can be muxed together rather than having several calls throughout a component to doSomeAction().