It never has, it always will. We've already lost a host of words that meant "I'm not exaggerating, I actually mean it": "really", "very", etc. I'm going to keep up the fight.
Language is defined by its speakers, as basically a "vote". I'm going to keep voting for "literally" meaning "this actually happened" as long as it's practical, because 1) there are dozens of other ways to emphasize something 2) we need some way to say "this is not an exaggeration".
Why a quantum leap isn’t the length of an Ångstrom will always sadden me. I’m sure there are other scientific concepts you can use to describe a Great Leap Forward…