Katsunami, just think of USE_ALT_FONTS not as a hack, but as a undocumented feature. That makes it sound less dirty. No matter now that it took a deep hack of eureka (thank you) to find it in the first place.
Why don't we have folder view as well on Kindles? Because Amazon doesn't want you to sideload non-Amazon books or use external library software (e.g. calibre), if it were up to them. That it is possible is a good thing. Adding features that depend on the use of a computer defeats the purpose of the Kindles to be perfectly capable of working stand-alone without ever connecting to a computer.