Goblin Queen (She/Her/Hers)
I can't imagine how the game would still be inter-operable after 50 years of even careful changes, unless none of those careful changes amounted to any shifts of the sort that could reasonably be described as "innovations."Who said "no innovations"? Slow, steady, carefully considered and tested innovations over time. I expect D&D will still be the major TTRPG in future decades, especially if they are slow and careful.