Yeah it was fun in the beginning, after all who never thought about being transported to another world where you ate a big hero with swords and magic?
But what the hell, I'm pretty sure there's more isekai now than other genres/settings. It's gotten to a point that if I see the tag I just move on.
Probably not, but after something like 2 decade of zombie shit everywhere i will take ANYTHING over it. Also there are good isekai, bad isekai and chinese isekai where the only thing coming of it is the protagonist using modern Earth idioms and perfectly assimilating otherwise.