I would say the worst thing to happen to music was money - lots of it! When you have the kinda money floating around at the big record labels, it is going to make people even greedier, and that begins to influence the product. People look for ways that they can make even more money, often at the expense of the product they are selling. For example, in popular music there is a software program that analyses new music. This software compares the new music to existing top selling songs. Don't get a high enough score and the music doesn't get recorded or played. The result is that all music tends to sound the same, as everyone is trying to match the software algorithm. Further it reinforces itself. To get recorded I make it sound like the algorithm. If it sells, it reinforces the algorithm. Its an endless cycle
Now combine that with radio. To save money they began using automation. Automation means that I don't need DJs anymore - money saved there goes to profit. All I need is one DJ whose voice can be sent across country. I can also make sure that only the songs I want promoted are actually played. I no longer have to worry about some DJ in some town introducing new music that might knock my star's record off track. That guarantees I'll make money. Now I control what gets recorded, and when it gets played. The result is not only do the recordings sound similar, they are played over and over again.
The part of the equation they forgot was that when you hear the same thing over and over again, it gets boring. Why listen to this one singer when that singer over there sounds the same. The labels feel that since they are the only game in town, you have to buy their albums, except since I am bored with your singer I don't buy anything. And since everything tends to sound alike, I can let it fall into the background and the music begins to lack value. If it lacks value, why pay for it.
I believe we have lost a lot in the music industry due to greed and technology. Its not that the technology itself is bad, its the way it is used. It is the technology and the control it offers that has stopped new and different acts, new and different styles of music from appearing. Think back to the 50s and 60s (for those of you my age

). Technology allowed new sounds (like rock) to be spread far and wide. It allowed old favorites (like folk music) to have a new place in our homes. It allowed music to be used for entertainment and to make political statements. Because of technology, music had value. If the technology used today was available back then, we would still be listening to Glenn Miller clones (as any music that didn't match the algorithm of Glenn and his orchestra wouldn't be recorded), and with automated playlists and no local DJs, Buddy Holly and Johnny Cash would have never had a record played.
As far as the comment "do you honestly think talking about online it is gonna make any real difference ?" let me ask you this - do you think staying silent will? We should be talking about it. Online, at concerts, anywhere we can. Because staying silent will ensure that it doesn't change.
Climbing down off of soapbox now