This is a fine Dave Lemley quote:
“It’s even worse than Doc Brown warned us in the 80s. Not only might world events be altered, but the very character and identity of every person involved is indelibly marked. If someone travels in time, they and everyone they encounter have a whole new reality to deal with, and, even if you relocate to one hundred years ago, you still have to keep moving forward in becoming the person you are who has had this experience. Plus maybe you end up at the spring formal with your mom.”
It’s of particular interest to me now, as I’ve recently been pontificating on how effed up things would get if there really was time travel. More on that later.