A 256Kbps AAC is objectively equal to CD sound quality, as confirmed by double-blind test after test. Furthermore, a huge portion of listeners will be hearing your angel's choir over cheap-ass ear buds or crap laptop speakers. Maybe you have a golden ear and can tell the difference between a CD and a FLAC file (are those good enough for you, or do they lack the sharp ones and smooth zeros of the digital masters?). Maybe you're not actually a delusional once-great who has lousy hearing and permanent tinnitus after years of playing rock concerts, and, well, being almost 70. Maybe your home hi-fi (do you still call it that?) was hand-wired by a wizened master of recording engineering fame. Maybe you have your own private anechoic chamber so you're not exposed to anything but the pure and sweet sounds of your own singing. But the rest of us listen to normal-person music with a dynamic range that's been shot to hell in the loudness wars, via normal-person audio formats, through normal-person digital-to-analog converters, into normal-person speakers, in a normal-person environment with kids playing and horns honking and dogs barking and coworkers chattering.
Your music, pristine to the heavens though it may be, sounds no better than Miley Cyrus when piping out of my MacBook. You've become a crotchety old curmudgeon trying to remain relevant to those kids who won't stay off your lawn, and maybe it's time to sit down with a hot cup of keep your yap shut and enjoy a nice book.
Good day, sir.