I'd mentioned before that, as computationally-generated fake background blur (or "fauxkeh") trickled down to ever-cheaper cell phones and became more realistic, the overuse of radically shallow depth-of-field would become less common.
For starters, it's definitely possible to have too little DoF. The temptation is there, when one has a new, fast lens, to run around shooting with it wide open all the time. I did that with my shiny new Voigtlander Nokton 40mm f/1.4* once and got a great black & white portrait of MattG...except his face was at an angle to the focal plane and only one of his eyes was in focus at that distance.
This isn't to say that fast apertures don't have their place, but in the days of modern sensors that are perfectly usable at very high ISOs, they're no longer an essential piece of gear the way they were when 400 ISO film was high-speed.
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