"90% of the work is at bevel set so then everything is mostly a synthetic edge unless you use a coticule or similar for everything."
Not to me. I don't need to bevel set on a coitcule to have a coticule edge end up on a razor.
Not sure anyone would believe that really.
Yes, I was pointing out that your logic is flawed when you said "No doubt this would save a ton of time! But, its mostly a synthetic edge."
Your edge from your polishing stone is always the edge from your polishing stone if that edge is already shave ready.
To get a particular stones edge to a razor you will need to completly override what is there before calling it that edge. A few strokes will not do it unless its a ridiculously fast stone. We are not really talking about the same thing.
Agreed, I believe you mention 8k but I said 20k. I can absolutely change a 20k edge on my Asagi ,dry, with just a few strokes. An 8k edge will require more what you describe.
If you are using a different stone to finish and want the effect from it then"just a few strokes" does not really change it much.
Again, the finer the stone the less it takes to finish an edge if the edge is near ready ie 20k at my preference.
How you get to the start of your finisher does make a difference - at least to me.
One stone honing does not yield the same results as a progression of different ones.
One stone honing is a waste of time . No one is advising that.
So yes, how you get there will change the outcome but going from a tomo slurry then diluting out to water will certainly imprint that stones edge much better than just a few strokes from another.
It depends on your second last stone & what you can do with it