Sure, but without FLAC I wouldn't be able to have my music in Opus without re-encoding from a lossy format.

Successful ABX test only proves that no differences can be heard for some particular pieces of music, but not for all possible music material. There are edge cases (especially where noise is involved) that can never compress perfectly without overfitting the compression algorithm.

As I noted, my reason for flac/alac is for transcoding purposes. I mainly just transcode them to mp3 currently and play them in itunes anyways, but I have the freedom to transcode to any format in the future without a degradation in quality. You can't do that with lossy formats like mp3.

Double blind tests show that 320kbp/s mp3s are indistinguishable from flacs, barring very poor masters or some extreme edge cases. For a lot of music you could get away with 256kbp/s probably, but it doesn't cost you anything to just go with 320kbp/s.

Their music is compressed down to 6db maybe, no wonder it sounds the same, the industry is to blame.