Yes, but also, within the FF segment which has a specific demographic (~10% of the overall camera market share), Sony has taken both Nikon and Canon's lead this last year outselling both its competitors FF MILC and FF DSLR bodies combined in quantity and value via BCN in Japan. Those buyers MUST clearly find something appealing with Sony's FF products to show that kind of growth even when they are continually criticized for poor color science/ergonomics/overheating/weathersealing/etc.... Those buyers are cross shopping $2500-$5000 bodies, not $600-$900 entry level body+lens kits and perhaps things like IBIS and dual slots do matter.
But I understand Canon doesn't have to cater to this crowd, because it still has 90% of the rest of the camera market and that market is what pays its bills. Yet, I also know we went from dual and triple lens smartphones in 2018 to 108MP 1/1.33" penta-cams in 2019, so that 90% of the market is also under the most pressure from being eroded by smartphones.
Either way, we will know soon because we are at the end of 2019 and Canon's new FF MILC products are due early next year. I'm hoping they will offer something I personally want in a FF system, but as you said, I'm just a mosquito bite on an elephant. Even the lot of us only make up 10% of the market...