These last bear some consideration. I think they reveal a bit of bias in our thoughts.
How many people play "Living" games? How many people are paying for the character builder? I think we tend to overestimate such things - just because we on EN World go to cons and play Living games, and use computer aids. But I don't know if those impose a similarity of experience throughout the entire gaming population.
By themselves? Certainly not. I've never played a Living X game in my life and don't particularly want to, and I'm not about to let the Character Builder get in the way of homebrewing up some races if I feel like it.
Nevertheless, they do contribute to a homogenous experience. They help spread the popularity of a specific style of play.
I will note one other thing - there were few games out there when AD&D was king. These days, people looking for a variant experience could alter D&D, or they could play another game entirely.
*blink* You must not have been playing AD&D in the same world I was. My recollection is that there was a ton of other games. Games ranging from Vampire to Rifts to GURPS to Shadowrun to Amber to Ars Magica - and God knows how many others - all got their start in the AD&D era.
Back then, every gamer and his dog thought they had what it took to found their own game company and make a go of it. Some of them were even right. Meanwhile, lots of players who had been sucked in by the D&D craze were getting bored with AD&D and looking for the new shiny, and MMOs hadn't yet siphoned off all the casual gamers, so there was enough money sloshing around the market to support a lot of startups... for a while.
From what I've seen, while there may be more non-D&D games today in terms of number of products on the market, the number of popular non-D&D games has drastically declined. There was once a time, as TSR spiraled toward bankruptcy, when White Wolf looked like it might actually mount a challenge to topple D&D from its throne. Can you even remotely conceive of any tabletop game being in a position to say that today?
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