Close, magnified examination, fingernail test, and I can cut paper with any part of the edge without any ripping or snagging. When I'm finishing up on the ultra fine, I gradually lessen up the pressure until I am just kissing the stone. In my experience, that knocks off the burr without creating new one when done right. It takes a lot of patience and control, but it works for me.
One thing I have never been good at quantifying is the amount of steel I remove when doing a light touch up. For example, if I do a light touch up on fine and ultra fine stones once a week for 20 years, how much blade will I have left in 20 years? I know most people don't think that far ahead, but I know knives have longevity and I don't want to jeopardize that.
Probably overthinking or worrying too much about that. I've found as my technique has improved, the amount of metal removed at each subsequent 'touch-up' has been greatly minimized. Gaining a feel for exactly how much work is needed each time makes the difference, using only the minimum (finest) grit, making the minimum number of passes on the hones, and regulating pressure to keep it very light.
The downside of trying to rely only on stropping to maintain an edge, for example, is that eventually the apex will round over and broaden, or lose it's 'bite', which will necessitate reshaping the edge geometry and restoring the teeth to the edge; that brings the inherent removal of more steel needed to accomplish that goal. A strop with more aggressive compound can be used; but it could be just as aggressive as some Fine/EF hones, and may not leave an edge quite as crisp, and work as efficiently, as a hard hone could do it, especially if the apex has previously rounded off or has otherwise become too blunt. Strops work well to refine a crisp apex, but they're usually not good at creating a new apex, if that's what's needed. Trying to 'get it there' with only an aggressive strop would likely remove more metal than would a handful of passes on a hone, and still wouldn't produce nearly as good a result.
I've sort of wondered along the same lines at times, and worried a little about taking too much steel away in the upkeep of a blade's edge. I have some Victorinox paring knives (in their very 'soft' steel) that I use almost every day, and I've really liked the edge left on them by an EF diamond hone. Subsequently, I use the EF diamond (DMT Dia-Fold or 'credit card' hone) to touch them up ~2X-3X per week, and I don't strop them at all, save for a few passes on my jeans to clear away any loosely-attached remnants of burrs. When I do the touch-ups, it only takes maybe 2-3 short, edge-leading passes per side at very, very light pressure, to restore the edge. Done as such, I have little or no worries about eating up the blade too quickly.
Assuming it gets used, metal has to come off the edge one way or another, to keep it cutting at peak performance. If your technique has improved to a point that you're effectively minimizing the burrs anyway, requiring little or no stropping, I don't think you have too much to be concerned about. Even less worry, if the Sharpmaker's Fine/UF hones are what you're using for most of your maintenance; they don't remove much metal anyway, even when trying to do so. Blades that get eaten up very quickly are usually the result of sharpening overkill, which comes from not really knowing how much work is actually needed to
just restore an edge, and therefore using too-coarse grit or too much pressure, or not recognizing or watching for when the edge is apexed, and therefore not stopping when it's reached. This is the value in deliberately creating a recognizable burr, which itself becomes smaller and minimized with experience at seeing or detecting it. Trying to sharpen without forming a burr at all is usually self-defeating, as the edge will likely never be fully apexed, and therefore not as sharp as it could be.
David