When I started this thread, I did not consider the down side of allowing changes in a flow or global variable to propagate and cause activity in a lot of nodes. This can be a good way to lose track of the logic of a flow. I have since found that it can be important to have strict control of which nodes can modify those variables and which ones use them. MQTT or link nodes really help to clarify these relationships.
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Yes - we have always held that one of the basic tenets is that you can see what is going on. What is connected to what, No spooky magic behind the curtain. So you can visualise the flow and trace events through if necessary.
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And those of us with literally HUNDREDS of flows over a half dozen node-red installs GREATLY appreciate that. If there started to be a lot of background "magic", it would be the death of me.
What I do wishj for is a better way to view/catagorize/select tabs/flows. But that is OT for this thread. 
Suggestions welcome (though also see outliner in next version (1.1))
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Man I'm behind the times! Outliner should work really well for me. 
No, you're just IN time for it.
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