-Not sharp enough and no way to sharpen them at home without diamond, or potentially aluminum oxide, stones -They're chippy and breaky. One of the reasons most makers produce them without a pointed tip. The high hardness of a material that is inherently not tough, reduces the toughness further. This material has the ability to take a razor edge, but it would be uselessly brittle. Under light use though, I can see them working really well for some users. -The geometry is terrible. The bad geometry of the blade sacrifices cutting performance, the bad geometry of the handle is just uncomfortable. Their near weightlessness is also a detriment for anything beyond small tasks. -They're typically only small and, again, lack pointed tips -I find them to be particularly unattractive

Again, if they work for you, great! I got nothing against that and nobody should think less of you. They just don't work for me.