I found How can I use wide aperture with fill flash?How can I use wide aperture with fill flash? and How can I use flash with large apertures?How can I use flash with large apertures? while trying to find a solution for using a large aperture to get DOF with the flash setup I have.
The answers seem to suggest that its difficult with standard equipment, but possible with a few options, one of which is highspeed sync, but according to an answer
"This does, however reduce the power output of the flash, by roughly two stops, so there's a game of diminishing returns going on."
My question is, is the use of a large aperture common (or not) when using flash in professional (or amateur) photography. I am curious as if it was a common technique, I would think there would be more options available, or more equipment offering it as standard (or is this a false assumption)?