How Dungeons and Dragons somehow became more popular than ever
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a.) Don't involve staring at a screen. I do that enough every day. All day.
b.) Doesn't involve eating &/or drinking as the primary activity.
c.) Is more than just "passive consumption" of someone else's hard work (theater, media, sports, etc).
Dungeons and Dragons really "scratches" this itch. It's a creative endeavor, where the ultimate goal is just to hang out and have a good time.
Maybe it's just an excuse to hangout, "shoot the shit" and get some laughs in? Or maybe it's a much deeper creative/intellectual endeavor.
Either way, it's been one of the best additions to my life in recent years, and it's gotten me to do a lot of thinking about the nature of creativity and the idea of crafting "fun".
That and accessibility. You can buy DnD book over the internet instead of having to go to your local comic store. But the fact that it no longer has a significant impact on social status is probably the biggest change.
Fantasy storytelling has always been big (from mythology to LoTR to GoT) but now it's reinforced with a positive feedback loop of tabletop and video gaming.
Add in the ability to instantly and cheaply download materials in PDF form over the internet, and even the ability to play games remotely using roll20, etc., and you have a golden era for D&D and potentially other tabletop RPGs as well.