omg CJK fonts feels terrible to work with. Delivery-wise they usually weigh at least a few MB (Some going up to 15-20MB), then you have *tens of thousands* of characters that are usually composed with proprietary font creation software that runs on a proprietary platform that you don't have access to, so even having the "source file" is as good as useless, and conventional font editors would take hours on end process these glyph, very cool :D