I remembered another unresolved issue with my iTunes music collection: the bitrate of the .mp3 version of the songs I had originally transferred into iTunes from CD, was as low as 160 kbps. This was oh, some ten years ago.
Nowadays, there is an ‘Apple Lossless’ option which will replicate the original CD in iTunes (bit rates of 900 kbps or more). The enormous storage capacity available on smartphones these days makes it possible to transfer and carry all of one’s CDs as-is in iTunes .. but is it worth it? The files would be up to 6 times larger than the original 160 kbps ones.
So my strategy is to upgrade only my very favorite CDs, say up to 30 out of the 300, that I now have in iTunes.