Two thoughts - Jewell Sleeves!!! Check them out. All my CDs are in them and they take up a fraction of the space.
Second, what happens when a new format for sound comes along and we all want to convert to that? Might be good to have the source discs. Or, when a new Roon device comes along and we want to give that a whirl. Again, nice to have the source material.
I also play CDs in the car.