It seemed like abstract gobbledygook to me as well on the first couple of reads. I've now read the series of posts 6 times over the past couple of days, and I'm starting to really "get it". It's creating a very good framework for some of the more intuitive examples I was trying to work through in my head/on this thread earlier.
@Daylen, VERY helpful. Thanks.
Back to @2B1S
Last winter, maybe December, I reread the ERE book and noted some of the realizations I made in my journal. At that time I created a similar, but more complex web, to what Daylen posted above. Of course it was specific to things in my life. One of the key takeways for me at that time was the only "node" that suffered when I removed full-time work node was the flow from it to monetary savings node. The saving node was (and still is) important to me because I view slack in my system mostly in terms of money saved and the income it can generate. I didn't think in terms of slack then, hence didn't have flows associated to other nodes from this one, outside of investment income funding other nodes. What I began to realize with this exercise was the full time work was only contributing to the savings node, and actually had detrimental effects to other important nodes in my life (ie flows from them to FT work). So even though conceptually I had no idea what I was doing, I consciously made the decision that creating more slack (slack in terms of money saved) was not worth the continued outgoing flows from other nodes to maintain FT work. I viewed quitting FT work as a wash to my complete system, so then the only remaining consideration was if I prefered spending my time at FT work or doing other things. Guess what won-out there?
Removing FT work from the web and seeing that it would still function was instrumental in my eventual plan to semi-ERE this year.
I've been looking for actionable items in this thread to advance Wheaton levels. I think my answer is that I need find ways to create slack from other nodes. IOW, extras in one that can be recycled into slack in another. Another option may be looking for waste in other systems and incorporating that into slack in my own system. However, the later has the potential of being viewed as "mooching", like @anesde noted earlier. If I can accomplish this on some small scale, then I will maybe will begin to experience/understand money is not the only option for slack. So, I believe I have my answer, unless someone else here feels I'm way off base.