This is how I've looked at it for years now, and the same can be said for basketball too. A lot of stuff is the same. I know someone will mention that there's dope shit and "you just have to look for it", I get that, but the majority is the same. Even the underground type of style today, a lot of guys have the same flow and come with that raspy "I'm hungry" voice.
It's just odd that so much is the same because I assume that in general people would want to make something their own. I guess it's just a different time now.
Besides the beats, this is so important. Listen to older stuff and there's some great lyrics and plenty of memorable lines, and with that we had great lyricists. I can't see anyone naming any rapper today as a great lyricist. And don't even mention Kendrick with his smurf voice. I just can't.