It's amazing, but the underrated APS-C enables nice combinations of body and lens that full frame can not overcome. Just think of 70D + 55-250mm STM, weighs about 1 kg and costs about $ 1500. To compete with this, full frame offers 5D mark lll + 100-400mm L, which weighs more than 2 kg and costs about $ 5000.
Yes, full frame allows high ISO, although the 100-400L has only reasonable sharpness. I love the cost benefit of APS-C.