James Joyce and Proust Again

I was hurrying to finish reading Charles Rosen's book Piano Notes because I had to return it to its owner. Rosen was writing about contemporary  music, and then he had this to say: "Not many lovers of literature have been able to get all the way through Joyce's Ulysses, and I have met only two people who have read every word of Finnegan's Wake...Few people would deny that parts of A La Recherche du Temps Perdu are extremely tiresome, even those lovers of Proust who judge the work a masterpiece...Disgust, bewilderment, and even the most exasperated irritation are not insurmountable barriers to aesthetic appreciation; they may in fact be a stimulus."