Since you asked!...
Folks today care out 'how blurry is the out-of-focus area", which is not 'bokeh', they merely call what they want by the wrong name...few are actually interested in good vs. bad looking blur.
Original articles about bokeh were published in a 1997 issue of
Photo Techniques magazine, editor Mike Johnston. Mike and I were in conversation for a period, about the possibility of my writing articles for
Photo Techniques. The original article by Harold Merklinger (1996) can still be found here:
https://luminous-landscape.com/bokeh/
Some key paragraphs discussing 'good' vs 'bad' bokeh are provided:
"The ‘bright ring’ effect is what I suggest leads to ‘bad boke’ and especially ‘ni-sen’. The ‘bright ring’ type circle of confusion allows some aspects of detail in the original scene to show up in out of focus areas and even to be replicated. An extreme example of the ‘bright ring’ circle of confusion is that produced by a typical mirror lens. Figure 10, by Kevin Hawk, shows a background out-of-focus spire as a very distinct double image.
The ‘bright core’ type circle of confusion is observed with the 35/2 Summicron on both sides of the point of focus. I suggest the bright core circle of confusion leads to pleasant out-of-focus images, provided the core is not too strongly concentrated. If the central bright core is too small, again some fine detail is painted into out-of-focus areas‚ although at least it is not replicated.
It is important to understand that many lenses will not display ‘good boke’ or ‘bad boke’ under all conditions. The ‘bright ring’ effect of the Imagon is brought under control to some extent by the sink-strainer aperture, but even so, this lens will show a smoother out-of-focus image for objects behind the main (in focus) subject. Out-of-focus objects closer to the camera will be imaged more harshly. Lenses like the 180/5.6 Nikkor, on the other hand, will show smoother out-of-focus images for objects closer to the camera than the main subject, and harsher images in the background. The Summicron gains its reputation by showing smooth out-of-focus images on both sides of the main subject."
In 2010 Zeiss published a paper which discussed bokeh on page 25. https://lenspire.zeiss.com/photo/app/uploads/2018/04/Article-Bokeh-2010-EN.pdf
Then, in 2017, Zeiss followed up with a discussion, entitled:
In short, and back to OP, 'bokeh' is determined by choice of lens, and not by methodology of the photographer!
And 'how blurry is the background' is entirely controlled by the diameter of the aperture.
and 'how deep is the DOF Zone' is entirely controlled by size of the subject in the frame and f/stop used.