Once, when I was much younger, I might have jumped at the chance. But that would have been because I was young and stupid.
1. The past four hundred years or so have been a gradual rise along the technological S-curve, and we're just now starting to hit the vertical section. The next hundred years or so are going to be a lot more interesting to me than a static, low-tech society, no matter how whizbang the spells are.
2. One of the defining elements of fantasy worlds, at least the ones we play in, is that the conflicts are bigger and more whizbang than they are in our real lives. I don't really have a strong yearning to spend the rest of my life worrying about violence.
3. My favorite worlds are the ones that generate the best stories. Good stories does not equal good living, however, and my favorite worlds are often brutal. He opens the portal, and I'm all like, "You tryin' to kill me!? They be nasty stuff there!"