. . . Yes even me even though I'm not one of the carbide theory believers. Heck I'm still not even sure what the edge stability term really means, but it seems to have become quite the catch phrase.
Yo, db! Been wanting to comment on this, but having Adult Attention Deficit Disorder ... uh ... what was I going to say?

Oh, yeah ...
What sold me on the "carbide theory" we're talking about here was examining edges under magnification (300x plus) when I got wrapped up in doing edge retention testing a while back. Not only was I looking at edges at different stages of wear or degradation during testing, but also during sharpening. Interestingly, what really caused me to take notice was how differently my Sandvik blades were behaving, even compared to some carbon steel blades.
And BTW, something I don't think I've ever mentioned, or seen mentioned, is that you see a lot of different behavior with edges when examining at this level of magnification, and different high alloy stainless steels can show very different types of edge degradation, even though what you see would generally be described as chipping or microchipping. VG-10, S30V and N690, for example, show very different patterns of edge degradation in use on identical materials, which IMO clearly indicates very different structural properties. But they all show chipping at the edge, as opposed to the smooth, even wear you see on 12C27 or A2, for example.
In my mind this all relates to "edge stability" even though I can't offer you a good definition of the term. But I think edge stability is one of those things you know it when you see it. To me it's most readily recognizable when trying to find optimum angles, especially where a fairly fine, polished edge is desired: steels with lesser edge stability will rapidly lose sharpness due to this microchipping when compared to steels with greater edge stability when performing a specific type of cutting work. I believe there are numerous factors that affect this property, and generalizations are difficult ... for example, SG2 steel in my experience performs much better at lower edge angles than VG-10 or S30V. But it's also a very different alloy, at higher hardness.
Even though edge stability may be hard to define and quantify to everyone's liking, I still think it's a very useful concept. Edge stability is what steels like 13C26 and 12C27 have that makes them perform as well as they do, IMO. Steels like S30V, on the other hand, rely on other things such as wear resistance to achieve their performance characteristics.