the first benefit, yes (although I would say it is already two, the "graph" and the "flexible connection").

the second one being offering abstractions for re-use of partial graphs.

and it is notable that though CONNECTIVE takes away the worry of multi-casting in (hopefully) a lot of the cases, it is actually pretty conservative on that front and will in a number of cases default to not-multicasting, which might mean that you can get some unexpected behaviors if you are completely unaware of the concept. the plan is to expand the situations that it will make a good default decision for you on that front overtime based on how it is actually used.

EDIT: also thanks, yes as I mentioned somewhere else I actually started doing this for a super-efficient frontend framework (that effort epically failed), so I ended up being extra careful about a lot design choices (and to be fair, carefully delegating a lot of such choices to RxJS as it is a really brilliantly designed library itself).