You see it all the time. “I’m bailing on Canons, and switching to Sonys.” “So long. Nikon; hello Fuji.”
I have never understood how some people approach buying cameras like getting married. Cameras are tools. They exist to make photographs. There are many kinds of photographs. Some cameras are suited to making a certain class of photographs, and poor at making others. The right camera for the job depends on the job.
Switching cameras, meaning abandoning one system and taking up another, might be appropriate if you’ve decided that you’re never, ever going to make the kind of pictures at which your old system excelled, and you’re now going to make a completely different kinds of picture. But what photographer works that way?
Why not use the cameras you have for the things they’re good for, and buy new cameras and lenses only to do the things that those cameras aren’t so good for? And, since before you use a new camera or lens extensively, you don’t know in exquisite detail what it’s best suited to do, why buy a lot of equipment when getting started with a new system? I always start with one body and one lens, and buy more only as I learn what’s necessary to best do the task at hand.
Unlike in the larger world, monogamy in camera ownership is not a virtue, and rapidly changing serial monogamy sounds to me like a recipe for dissatisfaction.
This wonderful post from Roger Cicala is tangentially related.