^^^^ Important. Nothing worse than the smell of stale bokeh....
Who knew that, back when we used what are now "C&V" 35mm cameras (before they were C or V), that one day there would be a high-falutin' word for "the stuff that's intentionally out of focus"?
(Gets me thinking - if I mount my 45-year-old 10.5cm F2.5 full manual AI-hacked lens on my D750, can I call the out-of-focus background "bokeh"?)