I didn’t start reading Audio magazines until the early 2000s so I can’t comment as to what their contribution was in the historical sense. I also gave up on TAS when they became a shill for MQA but that is another story . And lately I’ve stopped buying Stereophile and others unless I’ve been alerted in this Forum to an interesting article. I’ve found that after a few decades even the best written audio prose can’t really tell me what something sounds like better than non professional reviewers.
However a few people here have singled out the impact of TAS in helping launch a Golden Age of Audio. I am not intending to disrespect those who state this, but I’m skeptical. Can a magazine have created an industry, as opposed to simply reporting on it? What was the peak circulation of TAS? I suspect that most people who bought systems in the sixties and seventies had never heard of it. Stereo Review,otoh, was fairly ubiquitous then. I also suspect that the relatively small number of Audio Connoisseurs that were strongly influenced in their formative years by TAS are likely to be posting on a site like this