I would say cultural standards have expanded.
Agreed. Thank god.
True, it allows for people like Kanye West but also, thankfully, for some-one like Pharrell Williams...
I'm closer to 40 than to 39 right now, but i still discover plenty of new music that i like by bands/artists that got more exposure in the last 3 decades...
The 90's,the 00's and the 10's have produced plenty of good artists/bands, but, besides one or two songs that make it into the charts, they don't appeal that much to the general audience...