One thing that I think diagrams are better at than common text-base PLs is that with diagrams (when the blocks are placed nicely) you can _very quickly_ tell wh

One thing that I think diagrams are better at than common text-base PLs is that with diagrams (when the blocks are placed nicely) you can _very quickly_ tell what is going into something (both directly and indirectly). Of course you can abstract away a bit with functions or intermediate values in programming, but at one point if you do that too much you now have a bunch of indirection that harms overall readability. All a balance of course, but "what takes part in this calculation" often feels more valuable than "what is the calculation itself".