It was in the folder when the game was first released too, I use to listen to it then sometimes.
The "high quality" is only a personal preference. Some people enjoy the original they played with over re-masters or new versions, and so forth. Like some people that played games back in the day with the "bad" sound cards, want to replay those games today with the same bad sound card they had, instead of using the better one, even though they can now. It's special because of childhood memories, and other things.
Like me, I bought Arcanum(well, my daddy did) the very first day it came out, so I have more love for the original music than anything that would be put out since. Great music though, however someone listens to it.