Thanks! As I said in the intro, typing this out really helped me organize my thoughts for why I keep sticking with the Sony body even though I don’t know that I feel a strong attachment to the body itself. If it turned on a bit faster and consistently, the EVF were a bit more glasses friendly, and the shutter were quieter I think I would be completely happy. An A9 will take care of at least one of those things, so it seems like a good next body to try.
And agree. I didn’t spend a ton of time with film, but my D40’s max level was 1600. It has HI1 at 3200, but that could get pretty noisy. My D5300 did go to 12800, but it also got pretty noisy fast.
It really depends on the shot, but ISO 12800 is completely usable on a modern sensor.