Earlier quoted context omitted.
The use of "literally" as an intensifier goes back centuries. I'm not sure why people act as if it's some kind of new development.
I don’t doubt you’re right, but that doesn’t make it logical. I’m curious how common this sort of thing is in other languages—words or phrases taking on the opposite meaning of their literal definition. “I could care less” is an example of a phrase that’s commonly used in English. Perhaps it’s debatable whether that one has achieved acceptance or not.
Natural languages aren't logical. Pretending or wishing otherwise is a fool's errand, and I guarantee there are many words and phrases you use all the time without thinking that are entirely illogical, but still make sense.
> words or phrases taking on the opposite meaning of their literal definition
The word you're looking for is "auto-antonym". Very common.
> “I could care less” ... Perhaps it’s debatable whether that one has achieved acceptance or not.
It has; the variance between could/couldn't is mainly regional. And it's an example of how phrases or idioms have independent meaning outside of the individual words.[1] Another good example is something like the [North American] "How are you?" - it's a greeting, not (usually) a literal question about how someone is.