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".

“Exponentially” and “quantum” are the only language hills I’d die on.

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…

I think the Quantum Leap expression can also be understood as a "step" with no intermediate stages, i.e. very abrupt or transformative.