It was entirely unnecessary for me to couch my response in such an antagonistic way last night and I apologize.
I make a fair amount of money (enough to pay for my gear list anyway ... you might take a quick glance as it's linked in my signature and is right here in POTN) shooting concerts. The technique I have always used to shoot the talent through 1D Mark 2, 1D Mark 2N, 1D Mark III and 1D Mark IV bodies is to spot meter with exposure linked to the selected AF point, place that point on their face, track them and wait for those special instants that show their personalities. This requires a lot of tracking around. It also requires a lot AF point shifting. Many of these moments are only 1/2 second long to less and the ability to know exactly where the active AF point is, continuously, even when passing through black areas (which are a large portion of the scene) is critical. Having to take my thumb off the AF-ON button and wiggle the multi-controller and place the AF spot cripples this process and reduces the number of 'money shots' I can capture reliably.
I also shoot professional boxing from the mat. The background for this type of work is almost all dark except for the fighters who move violently around the ring. I rely totally on autofocus using a single AF point which must be placed on a significant point in the image such as face or glove. It is very difficult if I can't know where that spot is continuously because that action occurs in 1/10th of a second ... not nearly long enough to touch the multi-controller to confirm the location of the AF point, move back to the AF-ON button and wait for the focus to occur.
If you shoot 'in the dark' but never in these types of situations, particularly for pay, you might not have issues and be perfectly happy with the results you obtain. If I can't produce excellent images under ANY circumstances, I will be replaced quickly by someone who can. So, again, let me more civilly say, "The fact that for your uses a particular piece of equipment is entirely satisfactory has little to nothing to do with the very different circumstances that others experience. To say that you don't have the problems/difficulties/issues being discussed suggests to most of us that you don't think such things are legitimate. Since we have suffered a great deal of frustration at this unwelcome and sudden change by Canon, particularly in a $7000 camera (which your signature suggests that you don't even own), we may over react a bit when you do this."
Invertalon wrote in post #14896210
I don't think it matters if I make a living with it or not. I still use the camera in demanding situations. But its not like its impossible to use in low light...
I was shooting at ISO 51,200 at f/4 at 1/5 SS... extremely dark. But all you have to do is move the AF point or push the AF selection button to light it up. Takes a half second at most, no? I see how it can bother people but at the same time, its not something that cripples the camera IMO in low light. It has its workarounds.