the reason why I like property is partially because of the link to an object property. the key difference between a stream and a property is that the latter holds a stable value / property that updates through time.
the term Behavior looses that a bit (in my opinion)
imho, but property is very confusing word. It has so many meanings, when I talk about Kefir.Proporty I always have to add more words to disambiguate the meaning. And most of the time I end-up with saying Kefir.Property explicitly.