I shot some photos using the black-and-white setting on the Sony A7 II. Sadly, what you're looking at isn't as sharp as the original; that will be true for all the images in this gallery because of the way the site compresses photos.
The defocused background in this shot is seriously smooth. (Sadly, you can't tell because of the blocking artifacts from the compression on the site.) You can see how the blur continuously increases from the foreground to the background as well, which is one of the differences between optical bokeh and the algorithmic bokeh we see in phone cameras.
The exaggerated blur on the edges of the frame helps deemphasize distractions, like the guy on the bench to the far right. My inability to keep a level horizon is legend; I'd have straightened this, but that would require losing parts of the image around the edges, including the distracting guy I'm using as an example.
The rusty red really pops in Adobe RGB, but sRGB just crushes it. (Scaled down and saved in order to show portrait photo in horizontal aspect ratio.) You can see how the aberration gives the bas relief a purple cast. Ironically, here it's less noticeable at full size.