Directory-based navigation is multi-level hierarchical, allowing for efficient tree-based navigational structures, like author/series (or even genre/author/series, if your collection got sufficiently large). When a number of manufacturers
fully implement this feature, I see no reason to buy an eReader that would require me to
hack it in order to imperfectly emulate this feature.
I had thought that this thread was for finding out what
different things people who buy
different brands of eReaders are after. But apparently it is for
eschwartz the boldly underlined, the One True Authority on the
Correct Way to Use an eReader, to
lecture those who have different preferences or priorities on why they are
"totally wrong" (generally based upon a caricatured 'straw man' of their actual opinions).