Black ones. Green ones. Yellow ones. Blue ones. Pink ones, for heaven´s sake.
Little bitty ones. Even smaller oblong ones. 74 minute ones. 80 minute ones. 99 minute ones that hardly anybody can use.

Suddenly, buying CD-Rs has become complicated.

In the olden days, CD-Recordable media came in two basic flavours. There were brand name discs, that worked, and discs from funny unknown vendors that, well, often worked.