At least on the precision side, the issues of parallax have been mitigated by the combination of better glass and adjustable parallax at the high end. Beyond 200 yards is where parallax can become an issue, and there are still some low end variables with parallax issues. I used to use a fixed 10x at the range for group shooting out to 600 yards in an attempt to remove parallax errors, but now I don't need the 10x.
Where, and how I hunt and compete in matches often has me adjusting the magnification on my optics. With the Switchview, it is fast and easy, so that helps too.