I guess it is going to come down to how good is good enough for an individual. I worked with a guy who told me the story about not being able to sort a deer out of the background with his bargain scope when he could see it with his normal vision.
Then there is my own example of sitting on a hillside seeing a nice buck at very last light feeding its way along on the far hillside. I had a 2.5-8x36 Leupold Vari-X lll on a .308 and shot when he was broadside. One shot and gone without a trace of a hit. The next day on the same hillside I had my 1.5-6x42 Zeiss 30mm Diavari on my 7mm-08 and looking at that same hillside where the deer was and I said to myself “What were you thinking?” There was a wall of brush that a bullet could deflect on. Optical resolution matters. That Leupold is on a seldom used .22 now.
