I dunno, Joe. We've all aquired so much gear and so many lenses to the point - in my view - that it actually impedes doing good photography because we end up with our minds cluttered with decisions. Which camera, which lenses... rather than deciding what do we really want to do today in terms of making a photograph.
I've got a pile of perfectly working Spotmatic bodies and Takumar lenses galore, plus a Pentax istDS DSLR, and a Bessa R w/35/2.5. And a Rolleiflex 2.8 Xenotar. Oops, forgot the Yashica T4 Super.
If you told me that I could only have one camera and that I must live with it forever, I'd take the Rolleiflex. Sure, it's archaic, perhaps even gothic. But it slows me down and makes me think about why I'm out here with a camera in the first place. I don't have to decide whether to frame portrait or landscape because it makes no difference.
I mean if you just leave the house each day for one week with the same camera and lens, you get to know it rather well. You adjust to it visually and you learn what kind of picture you can take with it. Finally, you learn what you and it do best. And after you've gone through all your gear you might come to the conclusion that some of it you don't need because you didn't like working with it.
I do this frequently - spending a week with just one camera and just one lens. As I tend to see wide, I really feel comfortable with a Spotmatic and the Super Takumar 28/3.5. It's such a good distortion-free lens that most people who look at an image from it don't immediately realize it's from a wide-angle lens.
The Bessa R with its amazing color skopar 35/2.5 I could also live with, and have indeed spent a week with. As I recently got hold of a 50mm Jupiter 8, it's next.
More than wanting gear, I want to make good photographs. A friend of mine recently bought some sort of ancient German TLR, I think it's an Ikoflex. It didn't work, of course, but he took it apart and fixed it and then went out and took pictures. Some are quite impressive.
Am I tempted by gear? Oh, yes! Do I want a Z1 and an M8? Oh, yes! Can I afford them? Well, if I sell my SO into slavery, sell my Passat and buy a Ford Escort, perhaps. Will these cameras make me a better photographer?
Probably not, any more thanl selling my Passat and buying an Infiniti will make me a better driver.
But the Infiniti would be more fun, and maybe that's what GAS is all about.
Ted