"[...] I have a very high degree of resistance to any camera not made by Canon."
Can I ask an honest question: Why?
I'll speak just for myself: after my first SLR camera, an Eos 300 that was gifted to me, I bought on my own the EOS 33, which was controlled by a front dial, close to the shutter button, for the Tv, and a back dial for the Av.
I found that very same dial setup when I bought my first DSLR, the 10D in 2006, my first FF DSLR, the 5D in 2009, and my first ML, the R6 in 2021 (which also added the third dial on top, that I use for iso, closing the circle of "having all the exposure triangle on dials without using buttons/combinations/touch/menu"). And the menu UI is the same since I bought the 5D II, in 2010.
To date I don't remember ever taking a single photo with a non-Canon ILC camera since I laid hand on that Eos 300, 25 years ago; I actually touched a Sony ML, because one of my second shooters uses Sony, while I think I've never physically touched a Nikon ILC camera in those same 25 years.
(But I used film medium format, and was only last summer that I sold my entire Hasselblad V kit after being taking dust for too long).
Canon has always made me feel at home, so I frankly have never even remotely considered not to switch, but to even try something else for the sake of seeing what was on the market; I'm considering a possible switch only in the last couple of years (I thought about Sony when moving from DSLR to ML), but it's just for the third party lens issue.
Other than that, I have to say Canon never let me down, and I have never found anything missing that could lead me to look outside the Canon world
when purely looking at camera bodies.
They're just perfect for me, for what I do, for how I do it; I used the same body controls for almost 25 years and the same menu for 14 years; that's what any professional will look at when evaluating a work instrument. I can handle (almost) any Canon ILC of the last 25 years and getting to be using it at 90% of its potential in the next 15 minutes, and refine the buttons and dials muscle memory in half day of work with it. Can't ask for anything better.