I've questioned whether new HIFI is better than the older stuff. CD does sound better than vinyl and I think the vinyl revival is just people getting on a lifestyle bandwagon, or perhaps is just a rejection of new things as a whole. Some people don't like change. I don't think, however, that new CD players sound much better than older ones. The Red Book stanfard must be over 42 years old now and there's nothing left to add. CD sound quality peaked many decades ago and shoving CD data through a modern DAC won't improve things. You can't add extra bits and quality to the CD format. Speakers are better, but many are still average compared to similar priced offerings years ago. New materials and sophisticated computer modelling has improved sound quality. Internal components have finer tolerances and many speakers can deliver incredibly high quality sound, while being very efficient at the same time.