The problem with Excel is the wall you hit once you reach a certain level of complexity. If you're looking for a pure code solution, using a data flow library (

The problem with Excel is the wall you hit once you reach a certain level of complexity. If you're looking for a pure code solution, using a data flow library (https://common-lisp.net/project/cells/ https://common-lisp.net/project/cells/) takes some of the weight of your shoulders.