If I had a nickel for every time I encounter a photographer who is preparing to sell all their gear and jump ship to another camera brand I would actually be able to do so myself. Except I wouldn't. Swapping out camera brands based on some ill-conceived belief that it is the brand of gear you use that is holding you back will do nothing more than lighten your wallet and force you to spend a chunk of time relearning a new interface.
The Grass is Always Greener
I get it, we all experience it. The other company does this better or that better in some wonderfully miraculous way that you just know will make your photos better. Really, its what is holding you back. How could Nikon not make any f/1.2 modern lenses? Or how could Canon not make a 105mm the size of a truck? It is preposterous! Obviously the other brand is clearly more connected with the style of equipment that you need to fulfill your photographic journey. I've got a secret for you: that's complete nonsense. Yes, each brand has slight edges in certain and very specific areas but I put a monstrous emphasis on the word "slight." At virtually everything all the camera companies are nearly on par with each other. The vast majority of photographers would never be able to tell the difference in final images let alone clients or the public. Even when looking at rankings on sites such as DxO who are renowned for being biased, there are only very marginal differences between equivalent tier cameras or lenses for each brand. The grass isn't greener, you are just too distracted by how green the grass is on the other side of the fence to notice the grass you are standing on is pretty much exactly the same.
But So and So Rock Star Photographer Shoots with Another Brand
I'm sure they do. I'm sure they are also amazing photographers. Do you know what I'm also sure of? Their skill doesn't have anything to do with the brand they shoot with. That rock star photographer is dominating their space because they are fantastically talented and work extremely hard. If they were to switch brands tomorrow, very little would change and they would still be amazing photographers. Don't chase specific brands because some other photographer who you look up to climbed to the top of the industry shooting with something else. The image quality is always almost wholly dictated by the individual pressing the shutter button, not the company that made the shutter.
But that Guy in my Camera Club Says this Brand is Best
I'm sure he did, we have all met someone like that: the die hard, elitist fan-boy. He or she is wrong; simple as that. Their love of their particular brand comes from experience of having that brand in their hands when they felt successful at their craft. It is confirmation bias. There isn't really any rational argument that could place any major camera manufacturer distinctly above any other. Don't let elitist friends, trolls, or mentors convince you that your camera brand is crap.
Did I Mention Expensive?
Switching camera companies costs a lot of money. Everyone thinks they can sell all their gear for most of what it cost to buy it so the switch isn't too expensive. What most people forget is to figure in costs such as taxes, shipping etc and you are dreaming if you don't think people are going to negotiate you down on the used market. You may very well earn back a significant portion but once the switch is over it will have cost you a considerable amount of money and time to end up exactly where you were before the switch.
So Don't Do It!
At the end of the day, simply don't swap camera brands unless you have an extremely compelling reason. Swapping camera brands is a waste of time, effort, and money that you could have invested in improving your photography. Manufacturers thrive on making everyone want to switch; they sell more stuff that way. But your goal isn't to bump up as many executive bonuses as possible throughout your photography career. Rather, you want to focus on continually making superior images. Swapping camera brands does nothing to help you reach that goal.