To be fair, how many people in this age group, with their phones, actually have seen (or at least noticed) anything other than a digital (no hands) clock in their lifetime?
Honestly, most of these players are 22 and under, which means anything that was common prior to about 2005 has never been part of their life. (writing out checks, rotary dial phone, an actual radio in the house, ect)
Remember in the old days, the joke was you needed to grab a 13 year old kid to help you program your VCR? Now, I wonder if you can find a 13 year old kid who would know how to do that, since they're probably too young to have actually seen a working model. I only say that since the last time I actually had a working VCR player in my house was 2004-18 years ago.