I have been always looking at camera with IBIS for underwater video. There are some little bumps and movements that cannot be avoided especially for close up handheld work
Recently however many cinema cameras without IBIS have come on the scene BMPCC4/6 ZCAM and some top range canon models like 1DXIII also do not have IBIS as well as Panasonic GH5s
I see lots of footage shot at 60fps and then slowed down to 24/25/30 to mask the instability and wobbles and the difficulty of the diver to hold the camera steady, personally I hate those type of shots as things underwater with some exception do not move fast at all. Water is a liquid after all with dampening effect. I also find that if you need slow motion you would need in excess of 100 better 200 fps to have something really interesting to see
So I wonder in 2021 how people feel about IBIS?
Are there advances in post production have better results than say 3 years ago (from what I can see artefacts show in water but maybe I do not know the latest and greatest software)?