I own both a 7D Mk II and an 80D. The 7D Mk II is for action photography: mainly aircraft photography and some wildlife like BIF. The 80D is for landscape, vacation, family, still life.
I want a more modern (i.e. capable) cropped camera for my action photography, so I am anxiously awaiting the 7D Mk III ..... if and when it comes. I planned to get me a new DSLR for cropped action photography by the end of 2019 (to be ready for the '2020 season'). I hope it can be Canon.
The reason to stick to DSLR is mainly because of the reasons already mentioned by AlanF for BIF.
As a future replacement for my 80D, a mirrorless may be the next camera for me there.
For these areas, the functionality of an EVF seems nice. On the down side, I would just have to give up having this as a backup camera for my action photography (but if the 7D Mk III comes, as long as my current 7D Mk II works I would still have no problem there either).