I have been straddling the fence shooting with a combination of Sony APSC (A6400 and A6500) cameras and have a plethora of great full-frame and APSC, Sony, Third Party, and Legacy lenses.
Most of my Canon gear has been sold but, I am presently hanging on to a Canon 5D Mark-2 and a 7D Mark-2, with Canon EF 100-400mm f/4.5-5.6L IS ii, Canon 100mm f/2.8 Non-L Macro lenses along with a Tokina 28-70mm f/2.8 ATX lens which I dearly love.
I am seriously considering cutting the strings to Canon totally and selling the rest of my Canon gear.
My plans would be to invest the proceeds of the sale of this gear (as well as other Canon gear previously sold) into a Sony full-frame mirrorless camera and either the Sony 200-600mm or 100-400mm lens.
I'd like to stay a low as I can price-wise for the Sony gear. A used A7Rii can be had in the area of $1,000 while a used A7ii would cost at least $700 more and a new A7iii would cost at least an extra thousand bucks.
The A7Rii does have eye AF (which is one of the reasons that I opted for Sony mirrorless in the first place) and the price really seems appealing, especially since I don't do video (low battery capacity is no problem for me nor the slower operation of the A7Rii).
I would use the A7Rii for product photography, for landscapes and for studio shoots with a model. The full-frame camera combined with my APSC gear would give me a greater versatility in equivalent focal length...
I no longer shoot professionally, so a single card slot doesn't bother me and I don't plan to shoot fast action.
My dilemma is between choosing an A7iii or going for an A7Rii and saving from $700 to $1,000 dollars... My mind says to choose the less expensive camera awhile my GAS says go for broke!

