4 modernities that made this image possible:
1) Eye tracking autofocus nailed the focus. This was the main reason I upgraded from my Nikon D750 to Sony A7rV.
2) High resolution. 61 MP makes it possible to see every detail of the bird, you can even see the fish scale of the pray.
3) AI-generated border. I did get the eagle in the photo, but there was no space between the wings and the border, so I generated some extra sky. (The sky right behind the eagle is real, and the mountain is also real, but I would never submit this to a wildlife competition given this cheat)
4) High FPS. Although 10 FPS is not unheard of in older cameras, it is still much higher than what was normal earlier. This is the only photo of the burst where I got the majestic pose including the mountains.