@DragonTiger
Since you used the word „literally“. Do you know the definition of „literally“? If you say that it‘s the opposite of figuratively, then you are only partly right. Because in recent years the world „literally“ has changed meaning and is more often used for „very, strongly“ and similar words.
And this is not just a theory, it is actually added to the Oxford English Dictionary:
c. colloquial. Used to indicate that some (frequently conventional) metaphorical or hyperbolical expression is to be taken in the strongest admissible sense: ‘virtually, as good as’; (also) ‘completely, utterly, absolutely
My point is that it is the same with the term Isekai. It doesn‘t mean „other world“ anymore. It has a new meaning. It means a specific genre, that has gained insane popularity in recent years.
Digimon and Narnia weren‘t made in recent years and don‘t follow the same stereotypes, therefore they aren‘t Isekai.
Sure, 20 years ago you might have very well called them Isekai, since it means other world, like you said. But today the word has gained a new meaning and calling those two stories Isekai is extremely misleading.
.....but I know, according to you, the Oxford dictionary is probably „dumb“, right? 😉