FLAC is lossless compression format. Music decoded from it is identical to AIFF. The only difference is that listening to compressed file requires uncompressing on the fly, that can possibly affect timing of the samples coming out. It could possibly make audible difference with some playback programs and interfaces like S/Pdif, but won't make any difference with async USB, Ethernet and WiFi.
I keep my music in ALAC, format similar to FLAC. It saves me about 50% of disk space. Take one great sounding piece of music and play it in both formats. If you cannot hear any difference keep it in FLAC. The only disadvantage of the FLAC is that some programs like Itunes won't play it. You can always batch convert all CDs to different format, when needed. I use XLD on the MAC for ripping, but recently fre:ac for batch converting. It is great free public domain program for all platforms.
https://www.freac.org/
I keep my music in ALAC, format similar to FLAC. It saves me about 50% of disk space. Take one great sounding piece of music and play it in both formats. If you cannot hear any difference keep it in FLAC. The only disadvantage of the FLAC is that some programs like Itunes won't play it. You can always batch convert all CDs to different format, when needed. I use XLD on the MAC for ripping, but recently fre:ac for batch converting. It is great free public domain program for all platforms.
https://www.freac.org/