That's an advantage -- but also a disadvantage It means someone who wants to be a composer has to start pretty much from scratch. Should I write something minimalist or 12-tone? Influenced by African folk rhythms or sounding like Muzak on a spaceship? Should I write it for a cappella choir, synthesizer, or just a bunch of guys banging on garbage can lids?
In the old days at least you could say, I'll bet if I wrote a set of 12 minuets, I could make enough money to pay the rent this month. Today you more likely have to have a day job.
In the 20th century, there were still performers, like Godowsky, Busoni, and Horowitz, who made their own arrangements of familiar pieces, which is pretty much the same thing. And Volodos still does it. And performers of 18th century music are expected to provide their own ornaments and cadenzas.But really, if you like the idea of improvising, why not just learn to play jazz? It's much more musically exciting and fresh than anything that's being written in the "classical" world today. And I guarantee you'll never come to end of what you can do with it.
All I know is, I keep trying to give jazz a chance, I buy albums from time to time, I sample mp3's from time to time, and none of it satisfies me anywhere near as much as non-jazz stuff (except Gershwin, some Jarrett, some boogie woogie, and a few others). So I'm just saying, what is someone to do if they enjoy non-jazz music so much and they want to improvise?I think the above website provides plenty of evidence that the classical world is beginning to realize that improvisation is not necessarily always jazz. If you'll dig a little deeper you'll find some videos of totally improvised classical compositions, I seem to recall finding a cello/piano duet that was pretty good. It isn't just mere embellishment of written pieces.