Just picked up a Canon 5d MK IV and boy is this thing amazing.
And i would like to share a photo that i wouldn't have even considered taking without a flash on my 70D
taken with canon 5D MK IV and Canon 16-36 F4 @ f4 1/15 sec ISO 12800
and when you have good light things are even better
taken with canon 5D MK IV and Sigma 150-600 C @ f7.1 1/400 sec ISO 400