[QUOTE=Little Nemo]
I think we need to consider two different things here: creativity and talent. Performers might tend to lose their creativity but their talent usually stays at a pretty even level or even improves over time. People like Mick Jagger, Paul McCartney, or Bob Dylan can still sing and play as well as ever (or as poorly as ever in Dylan’s case) but their writing has declined. I’d guess it’s evidence that people usually only have so many ideas - they get used up faster than new ones arrive, so at some point people run out of inspiration.
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Success breeds victory disease; a failure to innovate.
In the case of, say, the Stones, they write songs about as well as they ever did; it’s just that they’re writing the same songs they always did, or are trying to.
Bands that are pretty much just coasting tend to be those bands that are rewriting the same songs over and over again. AC/DC released “Back in Black” in 1980, and have since been trying to remake “Back in Black” over and over again. Every new Stones album sounds the same. Paul McCartney’s songs, after awhile, started sounding like they’d been written by a PC application called “Paul McCartney SongMaker for Windows XP.” All Aerosmith songs since “Permanent Vacation” are essentially identical.
The history of modern pop/rock is once of constant innovation. People like to hear the new sound. First they liked old school rock and roll, then doo wop, then the Beatles came along and then you had Brit rock, then you had folk pop, then Zeppelin invented hard rock, then you had an explosion of new stuff in the 70s - disco, punk, metal, rockabilly. Later came modern pop, New Wave, synth, dance, and rap emerged, which led to hip hop. Metal spawned hair metal which spawned new metal and grunge. So on and so forth.
People have always wanted new stuff to listen to. What was popular ten years ago is not popular today. Oh, the basics stay the same - good beats, good hooks - but the presentation must change.
Those few bands that do stay fresh and relevant and DON’T get relegated to adult stations are the ones who’re willing to do new shit. I don’t really like Madonna or her music, but you’ve got to admit she tries new stuff; it’s all within the general field of dance, but she’s always put new twists into it and has been ahead of the curve on a lot of things. Paul Simon had a monster smash hit with “Graceland,” which was 20 years or so after he hit the scene, because he went out there and found a new sound. It’s interesting to note that Aerosmith reemerged on the strength of a crossover rap/rock cover they did with Run-DMC.
Most of the time, however, the bands that seize the new sound, or invent new sounds, are young bands who simply have more to gain by trying new stuff. The Stones didn’t have any reason to experiment with the raw sounds, distortions, and Gen-Y lyrics that became grunge, so why would they? Instead, guys you never previously heard of like Pearl Jam and Nirvana tried it out, and whaddya know, struck gold. It never would have occurred to an old established band like Aerosmith to try furious thrashing and revolutionary-worded yell-singing to create new ass-ckicking tunes, but it did occur to Rage Against The Machine, since they were unknowns and needed something new anyway. And why would, say, Diana Ross have wanted to try something bold and new the way Lauryn Hill did both with the Fugees and on her own?