Any good album I buy on CD, usually from Amazon and get the free MP3 download with it.
Unless you are using a lossless format the difference in quality through a real sound system is staggering.
Not to mention AMAZON is the fucking WORST for MP3's since they use the same setting for EVERYTHING and force a lowpass value of 19.5Khz, meaning MP3's from Amazon aint even proper 44.1Khz, they're 39Khz in a 44.1Khz band. At least iTunes, Spotify, etc, don't impose a lowpass so you get the genuine full 44.1Khz.The compression on even the best MP3's gives them a sound only slightly above a stereo cassette. Play a CD through a good system (Boss headphones or a good stereo system), then do the same with an MP3, then a cassette. I too bought and made many MP3s in the 2000's and I didn't go back to CD for nostalgia. However, with digital...I do use WAV or FLAC. FLAC is the top. Right side is WAV pulled from a CD -- left is the compression of any given MP3.