I never get tired of running I6 Ravenloft every October. It’s one of those adventures I think everyone should get to play at least once.
It really did change the D&D game. Strahd isn’t just the boss waiting at the end of the dungeon. He watches the party, tests them, toys with them, and shows up when he wants to. The villain, not the dungeon, was the focus and it was wild.
That may feel pretty normal now. In 1983, it really wasn’t.