Marcin Ignac asked me the following on Twitter:

"We are actually starting to think of abstractions/groups/sub-graphs in Nodes just now. Would you have any pointers to environments doing it well or wishes for a better way of doing it?"

Yep, I've got wishes.

Speaking of Marcin's Nodes project, this is essential reading: https://nodes.io/story/

Every visual programming language should have that depth of thought put into it, and should share that thinking out loud. Beautiful stuff.