All this techno jargon. Yes I chimp, but I call it looking at the screen. :shrug:
With several remote lights around the place, it is an easy way of checking if one is too harsh. I will also check if I am pushing the boundaries with panning - 300mm at 1/30th hand held, that kind of thing. You don't worry about the failures, it is the ONE that works that you are after. I get a hit rate on boats, from a boat, of about 3 in 10 when using slow shutter speeds with long lenses. It only takes one of the boats to lift a bit during the exposure and it is in the bin. VR might help in this regard, but I am not binning my 300 f2.8 to buy another with a VR system in it - I would rather get them to make another couple of passes and shoot a few more frames. I don't pay the fuel bill!