“Nah, I don’t play Dungeons & Dragons ‘X’ Edition.”
“Sorry, sounds like a good campaign idea, but I really don’t like edition ‘Y’.”
“You play ‘Z’ Edition? Blech!”
How many good campaigns die or are stillborn because player become edition snobs?
How many game masters (especially the good ones) watched their campaigns fall apart because a new edition begins to surpass the old and the players want to move on?
How many game masters get judged and found wanting, based only on the edition they want to run instead of the main concept if their campaign?