There may well be some truth in the explanations proffered here. But personally, I just think it's because today's music is simply, objectively mostly worse.
(Another explanation not offered in the piece: when people get nostalgic for the music of their youth, they usually remember the best music from that time and forget there was a whole lot of crap then, too.)
Back in the day Graham Nash of CSN and CSNY made some beautiful music.
"In the Air Tonight" by Phil Collins, "Wipeout" by the Surfaris--two good ones--and 15 others.
Related: "Top 20 Drum Intros of All Time".
Beatles #1, Elvis #3. Guess who's second?
A rather different view: "List of best-selling music artists".
"Find Music from the Latest Shows & Movies".
What real rock-and-roll was.
Natalie Merchant, live, 2005. (5 minute video.)
The Bangles.
From way back in the day, the group was called Free.