Some labels don't even put this information on the CDs themselves. Others hide it some place inside the brochure. This makes it hard for people like me who want to replace their analog LPs with digital CDs. Too Long to Fit on Side One. Rather than put long Mahler symphonies on two CDs, it would be much more convenient to have them on one.
Jewel boxes with two CDs are awkward to open, close and store.
Two sides of one CD should hold up to two hours 20 minutes of music. Thou Shalt Include a Proper Brochure of Program Notes in Each Jewel Box. Every once in a while a CD maker tries to get away with a single sheet with small print folded into the form of a brochure. These are unreadable by people whose eyesight isn't what it used to be. Furthermore they generally can fit only a few paragraphs, each of which is then repeated in French, German, Spanish, Italian and what looks to me like Outer Mongolian.