Progressing history forward is overrated, in a way. What I mean is that, while you can and should grow your characters and lore, you age them too much of have things evolve too far, and the various lore begin to lose their meaning and intent. There's only so far things can move forward before the story ends. And these characters aren't designed to end, they're designed to be everlasting. So you can only go so far. 5G was an example of trying to go way too far.