Back in the early 90s when I was writing https://en.wikipedia.org/wiki/Multi-user_dungeon https://en.wikipedia.org/wiki/Multi-user_dungeon 's, and for a while h

Back in the early 90s when I was writing https://en.wikipedia.org/wiki/Multi-user_dungeon https://en.wikipedia.org/wiki/Multi-user_dungeon 's, and for a while had quite a few players, I was always keen to move as much functionality as possible into unloadable/loadable libraries, since restarting the game was quite invasive. To my surprise, this was seen as a pretty amazing feature at the time. I never understood why many/most of the other MUDs at the time didn't utilize this.