Because CDs ushered in an era of crystalline highs that were never captured well before. Vinyl and tape are good at capturing lows, not so good at capturing hig

Because CDs ushered in an era of crystalline highs that were never captured well before. Vinyl and tape are good at capturing lows, not so good at capturing highs. After decades of muddy sound, they were thrilled to capture the highs. They overreacted and focused almost exclusively on the highs to the detriment of everything else. That's probably what setup the mega-bass trend in the 90s. Along with that, they went crazy with hall effect reverb on a lot of recordings. Everything sounds like it's being performed in a big, echoey concert hall. I'm really glad that fad faded!