your a little bit over reacting, dont you think?
It will be sad when all the 90's generation will stop for good (Jay,Nas,Snoop,Cube and all of them) - but there will be something new.
Things come and go, the truth? I love this few last years much more than 2005-2010

Kendrick is amazing, J.cole is great, Joey Badass is great,
Tyler the creator had a nice run, damn BIG KRIT is awesome...
I know that some of them are 30+, but they are definitely a different generation than the 90's I mentioned earlier.
I think the next few years will get even better... I'm looking forward to 2020

Think about it - musically 60's were dope, 90's were dope - every 30 years there's a new wave (hmm usually based on a different drug)
These new rappers that are in their prime (kendrick,krit and etc) are just the first swallow.