I just upgraded my iPhone. I didn't even look at the specs for the camera when I chose it. I realize that a lot of people get new phones because they want a better camera. When I want a better camera, I buy a new camera. I carry my phone in my shirt pocket. Phones keep getting bigger and bigger. I don't want that. When I want to use a tablet, I use my iPad. So I got the iPhone SE. I restored to it the last backup from my 6S, so it seems identical. The processor is vastly faster, but I don't talk any faster when I use make a phone call. Anyhow, I take relatively few pictures with the phone, mainly in situations where I didn't bring a camera and am surprised that I want to shoot something. Otherwise, I'm in an exotic place that I'm afraid I won't be able to find on a map later, so instead of pairing with my camera to put GPS data with pictures, I'll just take a shot with the phone and check that picture's location.
So I didn't count the phone as another brand. I'm not shooting just Canon out of some doctrinaire position. If I had had more money in 1970 or so, I would have bought a Nikon for my first SLR instead of the Canon. My first digital camera was a Casio that had a Canon lens. My first DSLR was a Rebel I bought as an impulse purchase when I was supposed to be looking at TVs, washers, and dryers for my new home.
Last fall I did look at Sony's offerings when I was considering an upgrade to my G7X II travel camera before a trip to Italy, et. al. I found they had made their lenses zoom farther and made them slower, so less suited for my travel pictures. I also looked at the M50, which was nice, but I chose to stay more pocket-sized and got a G5X II. There is some convenience with using cameras that have similar controls and menus.