It is pretty crazy. The AFC is currently loaded with young, talented QB's compared to the NFC. It will be interesting to see how long it takes for the NFC to catch up to the AFC, once the "old guard" QB's retire. Brady, Brees, Ryan, Stafford, Rodgers, (Wilson?) are all on the back 9, while guys like Allen, Mahomes, Jackson, Watson, Burrow, Tua, Mayfield, Herbert, (Lock?) are just teeing of on the first couple of holes. (Not to mention Lawrence and Fields both coming soon to the Jets and Jags).
I know there are some exceptions, like Roethlisberger and Rivers in the AFC and Murray in the NFC, but generally, there are way more up and coming QB's in the AFC compared to the NFC. I believe that the AFC will dominate for several years, until this tide turns.