3catcircus
Adventurer
Not really, no. There wouldn't have ever been grognards in role playing if they didn't accept the new game ideas when coming over from wargames. Plus, wargames also sometimes get updated editions and, if they're good, they thrive.
I look at grognards (such as me) as people who were around in the early days and know obscure things like *why* game rules are the way they are, what the evolution of the game is and how it came to be that way, etc.
Ask someone who started out playing D&D with 3ed why different classes have different hit dice and you probably won't get, for example, an answer that details that fighters get d10 hit die but in OD&D, they used the same hit die as the other classes (just more of them)...