Tony Vargas
Legend
Published adventures - modules - were commonplace when I started in 1980. I think it's always been a matter of personal prefrence with DMs, how heavily they used modules or published settings vs coming up with their own stuff. I've always tended towards world building and creating my own adventures. I've known other DMs who prefer to use published settings or create campaigns by stringing together modules. Both aproaches work just fine.
While I can see how modules might logically encourage sticking to standard rules, they've always been there, so I wouldn't look to them as the cause of the shift. The emergence of large on-line communities, OTOH, does correspond roughly to the waning acceptance of house rules. In the 80s you just had BBSs. In the 90s, there tended to be many fan sites devoted to a game, with discussions in chaotic usenet newsgroups. It was more recent (if you consider 10 years or so 'recent.' That on-line fan communities shifted to very centralized forums. And it was only once the WotC D&D forums were up that you started hearing people preaching about 'The RAW.'
While I can see how modules might logically encourage sticking to standard rules, they've always been there, so I wouldn't look to them as the cause of the shift. The emergence of large on-line communities, OTOH, does correspond roughly to the waning acceptance of house rules. In the 80s you just had BBSs. In the 90s, there tended to be many fan sites devoted to a game, with discussions in chaotic usenet newsgroups. It was more recent (if you consider 10 years or so 'recent.' That on-line fan communities shifted to very centralized forums. And it was only once the WotC D&D forums were up that you started hearing people preaching about 'The RAW.'