In almost every music video I watch there are the same few comment types on top. There is "Still vibing to that song in 2021!" and "They don't make them like that anymore." and finally "This used to be my father's favourite song. Reminds me of long car rides we shared. I miss him so much."
The first is a transparent attention grab, it happens for any year as long as the video gets enough views. The second is the only one of the 3 that's probably genuine, because it's such a common misconception that the music of your youth was the best, whether that was 50 years ago or 5. It is only the last of these that I wasn't sure about. I kept finding this type again and again though, always highly rated.
It absolutely IS a common misconception. Ask anyone, their favorite is from ages 0-25 or so. Makes perfect sense. That was when everything was fresh, they had their first crush, their first concert, whatever.
But now, the misconception ends. Mainstream music is now heavily degenerate, talentless, FAR less diverse, lack of instruments involved = less skill honing, practice, feedback and innovation among a group. And speaking of groups (a composer, songwriter, and singer in this example), they're disjointed. Don't even work in the same room. Don't even need to know how to read music. They even did a study proving modern mainstream music was more repetitive and stupid on the whole (comparing word count, vocabulary and such).
The artists these days are often hired not for their musical talent also, but for alternate concerns. Their ability to give fellatio, lack of principles (readily "sell their soul" to do whatever the record label asks), because they're a looker and that sells tickets to teenage girls...because they will dress as a devil, talk about sex in clear English (old music almost always used innuendo instead so they were not understood by the young), spread degeneracy and corrupt the youth and the easily influenced (women more so than men, matter of factly).
Think of how many older artists there were back in the day, even on the radio. Where are old artists on the radio now? NON EXISTENT. They're old and ugly, and have old-fashioned principles. They are relegated to doing tours and small time venues. There was tons of ugly artists in general too. Again, pretty much phased out now outside of rare exceptions. It's not about the music anymore.
I could go into far more detail, but I should start charging.