Not that I don't appreciate your work from back then, but as a longtime daily Mac user I cannot wait for the day that this is done once again. The Finder has so many bizarre quirks and it's so slow to proliferate updates that it's just embarrassing. Not to mention it's actually capable of locking up waiting for network access in some circumstances.
I don't know what the Finder source code looks like today but I bet it's a similar kind of hell project as the Classic Finder was back then when they first rewrote it, considering how reluctant they are to do anything to it.