Equipment can aid learning, or it can get in the way of learning. In theory, one ought to be able to increase photographic skills quickly, because photos are reviewable instantly and because it doesn't cost to experiment with the variables of aperture, shutter speed, ISO, tripod v. not, panning v. not, composition experiments, lighting experiments, etc.
However, having new equipment all the time could distract one from learning skillls, other than the new set of menus and options on the new camera. Plus, a familiar camera is easier to handle in situations where seconds count. The more routine handling is second nature, the more attention can be paid to why one is taking the photo in the first place. And shopping for new equipment also uses up brain space that could be devoted to intellectual and esthetic uses.