Are you trolling again Jonney?

[emoji14]
Files don't have to be huge, you have the option (which is nice obviously). Nikon do true lossless compression which takes the file size down to 51mb, vs Sony's lossy compression which does reduce the quality. If I had the A7RII I'd have to therefore shoot in uncompressed which would mean 81mb files
AF may prove to be better than the D4 yet we don't know. All tests show that the D850's AF system is excellent despite what you continue to believe
Buffer is very good, capable of 51 shots of lossless 14 bit full size RAW files and a whopping 170 12 bit RAW, that's pretty amazing considering the files sizes. Would you ever need 51 shots, let alone 170? I rarely reach the buffer on my D750 and that can only do 15 shots before the buffer fills.
https://photographylife.com/nikon-dslr-buffer-capacity-comparison