Speaking of iTunes Match, Reddit user “Synchrotron” has a rather good review of the service. After reading it, I’m certain I don’t trust it. For example:
Some songs (especially rap/hip hop music) can be mismatched. Within the context of hip hop music, if there is a “clean” album then your uncensored tracks may be the clean edit when upgraded. This adds a lot of burden of finding out if it upgraded you to the wrong file if you have a large number of rap songs.
I’m not immature, but nor am I a prude. If Nas wants to say “fuck”, iTunes had better let him.