Ken, do not get me wrong.
No offence intended in this post. More over
you, (and any other coder who hacks/extends/develops/enhances Kobo original software),
completely deserve full recognition and praise because of your work...
But it doesn't matter if Koreader either works or not... (or if my Adobe Acrobat, or my Foxit reader, also work). We are speaking about Kobo built-in pdf reader... Your no-bug situation does not change the buggy Kobo one... don't you think?
More over, take in mind that your software (and others) are not the solution for "casual" users. They are always somehow hackish, somehow tricky to install and launch (as a mere example: I have to launch Koreader and then open a pdf, I cannot go to the library and directly open a pdf in Koreader...). So, yes, your software is great..., but it's not for everybody..., no matter how good you make it.
IMO, if you want Koreader to be a completely replacement of Kobo Nickel software (or whichever name it has) you have to do something like PRS+ for old Sony eReaders, which absolutely and
transparently blends into the device original software and enhances/replaces parts of it.