i think the use of 'rat tail' is unfair. the tang is not the typical low carbon steel threaded rod welded (usually badly) to the blade like you find in el cheapo chinese fakes. 'hidden tang' would be a better term. the substantial tang is forged along with the blade, never welded on, it is peened over the pommel as most proper swords and knives have been for millennia. no one would say a randall fighter is not acceptable because it has a hidden tang. (even tho it's not peened. :

japanese swords and knives usually have a hidden tang, frequently only held on by a bamboo peg, no one criticises them for it & asks for a full tang (unless they do not really know what a japanese sword is).
the typical tang is shown in a recent DOD 'project knife' (top), note: ww2 models, chiruwa full tang left, plus the 'project' knife villager. right is a chiruwa ang khola model. the ww2 can come in either, like the ang kholas.
with a hardwood, epoxy* filled, grip and peened end, that knife will last as long at the 'full' tang models. it also, according to some, is more comfortable and definitely allows for more customization if desired.
*- or himalayan 'epoxy', laha, a resin, horse fibre thermally set cutlers cement.