>>3807661One obvious use case would be shooting a model at close range with extremely shallow DoF (i.e. one eye in focus DoF). Mirrorless will track the eye. DSLR tracking/auto point selection is not nearly sensitive enough to do this. The best examples can only track a face. You can still get the shot with a DSLR, but you must manually select the point over the eye. So you're moving more slowly.
Note that this does not apply to all or even most modeling shoots because your DoF is typically not this shallow.
Another use case would be an animal in foliage. Really good subject recognition will stick to the animal and not get confused by the foliage. However, if the animal is not moving quickly this fails as a use case because just putting a single point on the animal and pre-focusing is even more reliable than the best subject recognition currently available, which will still fail sometimes to find/keep the animal.
Mirrorless fans will cite sports but I've only rarely run into situations where keeping a point on the intended subject was an issue, where I think mirrorless subject recognition might have helped.
The best mirrorless AF...and for Canon we're talking about the R5/R6 and maybe M6 II here because everything else lacks good subject recognition...does improve on what's available in DSLRs. And it is really neat to watch. But at the end of the day the practical impact is rather small.
