I've been using full-frame cameras for quite a while, as for the type of shooting I most like to do they provide more detail and such..... In the past I also used to have a FF camera and also an APS-C camera and would use the latter for doing wildlife shooting, etc., because of the perceived greater reach. Right now I'm back to just FF and perfectly happy with that.
Yes, this focus stacking thing definitely seems to be the latest fad, but it's not something which particularly interests me, even though I do shoot a lot of macro and tabletop or closeup photography. I rather like the artistic, creative blur which when skillfully handled can be utilized when shooting with a wide-open lens or with one which offers good bokeh; I don't necessarily need to see all of my flower or other macro images tack-sharp all the way through the entire photo. Sometimes too much blur or too much bokeh in an image can be a negative thing, and ditto for too much sharpness throughout the entire image. Achieving a happy medium, a nice balance, using a body, lens and technique which works out best in these situations, just as it does in daily life. That said, if Sony ever gets around to implementing some sort of in-camera focus stacking process, I would be willing to try it out a time or two just to see what happens.....