As was previously stated, at one time gun mags were about the only source of information on the hobby. If you wanted to know and stay current you had to read. However these days, the internet (good or bad) is one of the if not primary source for info.
One could probably say that about any hobby as well.
These days if I want to read a gun magazine I just go to the basement and pull something from the 60s. 70s, 80s, or 90s stacks. Probably haven't bought a gun mag for 15+ years or so. Interestingly, the articles aren't much different now than the were back in each of those decades. The names change, but the stuff is pretty much the same. The point of magazines/media is to sell advertising. That means just enough substance to entice people to look and mostly fluff to sell ads.