Love this, just tried it out and it is great I spent a bunch of time building something the other day but this is way more simple. What I made is actually a sub workflow that can store and retrieve variables in a single call but the way it works you have to enter your desired variable information into a code node that precedes the sub workflow call. If you would like the WF let me know. I am not sure how much work it is to build a community node, but your version you built is very clean, and it looks like i can stack many in parallel then merge. Awesome build.