Ageism might be the last acceptable predjudice; and given the young/old divide implied by the OSR, you definitely see this in the gaming community. Case in point: last week on Facebook (because it's always Facebook), some grognard posted a meme waxing nostalgic about their younger days and marathon sessions. No putting anyone else down, no ugly edition warfare, just reminiscing about a happy childhood. Well along comes the inevitable contrarian, who suggested it sounded like "old man yells at cloud" stuff...
Really? Also, absurd. So here goes. Simply (1) being old, (2) preferring older editions of whatever system, and (3) enjoying happy memories doesn't make you the proverbial old man (or woman) yelling at clouds beyond the rather thoughtless imaginations of some. By this reasoning, every grognard should immediately burn their rulebooks and rend their garments over these false memories of happiness. If you're denigrating the younger generation and their rulebooks, you are this guy. But simply liking your favorite stuff is far from it.
I get it (and rather suspect it's tit for tat). The young are denigrated ad nauseum for being born decades too late. Their games, famously forgiving, are too soft (as though generation X stormed the blood-stained beaches at Normandy). It's Marxism. Storygamers are entitled swine (take that, Forge). This is old man vs. cloud multiplied, and every bit as ridiculous as the reverse. Games are played for fun, and each offers a different experience. Unless a ruleset involves bona fide homicide, it's hardly Hitler's invasion of Poland...
But it's not all bad. Last year (also on Facebook) someone posted a gag module called Against the Grognards. I pointed out that grognard implied the aged, broad brushing them as stereotypical Boomers who resist everything. What they meant was Gatekeeper, a sadly universal phenomenon transcending generations. And you know what? My Facebook friend agreed, changing the title and making it all the funnier. Laziness is easier than nuance, accounting for much confusion. But preference and nostalgia alone are no offense.