Brand loyalty is a double-edged sword, depending on what products the brand makes. In general, I don't buy a lot of unknown brands, but I don't mind mixing them in places like e.g. my kitchen.
When it comes to PCs though, I can see how sticking with certain brands can have advantages. Peripherals, for instance, often come with their own apps and programs. So having a bunch of different ones, means you may need to install 3, 4, or more apps to manage things. And if they have to run in the background it's even worse.
That said, I've found myself trying to stick with Steelseries for many years now. I have a headset, a mouse (one I've bought twice when the last one finally died after many, many years), a little RGB mousepad, and even a 5.1 RGB sound system. I may get a keyboard, so I can ditch iCUE.
While the sound system was a little bit of a new thing for Steelseries and had a few growing pains, I really like that I can manage everything with just one app. From how my speakers sound, to how fast my mouse moves.
Steelseries aren't perfect. They're heavily involved in eSports, supporting a team I personally wouldn't support myself. They're also adding a bit of bloat to their app, trying to push into the video game clips/capture scene, for which I've already got Nvidia - so there's no reason to bother with any of that. All in all, they're alright in my book though.
If you use your head and common sense, you can make the best out of brand loyalty and still know when it's time to not be bound by it. 👍