Joyce's books are, in a real sense, "unreadable", and thats to some degree what the attraction is.
Art sometimes is best absorbed rather than understood. Great art can reveal when pressed, but I usually only do that randomly to ensure that there is substance there, and there usually is.
Having said that, I am still reading the book only a few pages at a time every other week or so. I’m 25 years in and not even close to being done. I’m ok with that.
I've never read it end to end, and I probably never will, but there are passages I have memorized just from rereading them so many times.