Hot button topic. I am surprised how many people don't bother to test their lenses and cameras to see if they are playing well together. I am surprised at the less than civil rhetoric associated with the topic. If you don't check, how do you know soft images aren't caused by a front or back focusing problem? You can mask the problem with larger a larger DOF, i.e., smaller apertures, but then you loose the lower light capability of the lens.

Personally, I check all my glass with the bodies they will be used with and adjust as necessary. What I have found with my Nikon bodies and Nikon glass, they are pretty much on out of the box, with just some small occasional tweaks. Even if a Nikon zoom is off a bit, you only need to calibrate it at at one point and and all zoom factors walk in. With my Tamron glass, I need to calibrate at all the distances and zoom factors recommended. Same with Sigma Art glass. Once calibrated, I get good results.

The thing that surprised me the most learning how to fine tune is how much variation there is in phase detect AF (viewfinder). You really do need to take enough samples to understand both the mean and variance before making any changes.