The world is bigger and smaller at the same time.
I remember as a kid in the 60’s I knew “every” car on the American road. There are just too many now.
Everything is segmented, yet homogenized at the same time. Television brought the country together to the point that you can be plunked down in the middle of downtown anywhere and it all looks the same. Drive 20 miles on surface streets in Orange county CA and it’s like you are on a treadmill: you seem to keep passing the same businesses every few blocks.
But choice has also caused us to segment like crazy. Some watch TV, some sports, some play Wii, some xBox, some none. And it used to be some liked Chinese. Now, some like Thai, some Mandarin, some Schezuan, etc...
Too much to say. I could turn this cultural review into a book....
There are a lot of paradoxes out there.
In the grocery stores (and cable tv) I refer to it as the illusion of choice.
They may stock the brand I want of condiment or shampoo, but they may not have the (basic grade) product I want. And the majority of the cable channels are pwned by a few monopolistic companies (Disney, NBC, Viacom, etc). True choice is not on display there.
Same with radio, if it isn't Clear Channel, then it's probably (Viacom) Infinity Broadcasting.
And to carry on your point, yeah, everything is niche marketed now/fragmented/balkanized, that it has become a tower of babel/babble. Whether that is in music or even in "credible" news reporting. You know what not to trust, but where do you turn FOR something?