Well, whether CDs are ripped to mp3 or 44/16 matters to me. I have a range of CD rips which I’ve put into a NAS library, including a number of old CD rips.
I have since been listening to all of these files being played back on a highly resolving system. Occasionally I have been listening and then thinking a particular file being played is not right, the reproduced quality was just not quite right. Sure enough, when I checked the rip, it was actually a file ripped inadvertently years ago to mp3. This happened two or three times until I decided to check all of the rips and found a few more mp3 files. They have now all been re-ripped to AIFF, my file type of choice. Much better.