I've definitely dented and chipped SR-101. I chipped the heck out of my Mini Mojo trying to baton it through a log with a masonry nail in it, and I rolled a couple of spots on my Waki, which are bad enough that a steel and strop didn't repair them, so I'll need to sharpen them out.

I've also rolled INFI doing nothing but chopping wood, and dented the crap out of SR-77 batoning twisted, gnarly logs.

None of these was major damage that couldn't be fixed with some sharpening, but they aren't as mystically impervious to damage as some would make them sound.

I didn't have to baton through car doors or chop concrete blocks to get edge damage on every type of "signature" Bussekin steel I own. In fact, the only ones I HAVEN'T damaged yet are 154CM and D2, and I think that's mainly because they are EDC type knives that don't get used for much chopping.