By cells, I mean something like this: https://common-lisp.net/project/cells/ (there's even a HN discussion about it here: https://news.ycombinator.com/item?id=1885974)

which basically allows to express interdependencies between data (a.k.a. formulas) in a way that updates sink variables when source variables are changed.

At the moment, I think not even Rx extensions for .NET (which I consider to be the most advanced reactive implementation in a mainstream language) do support this style of computation.