No.1171
Isekai gets views like nothing else, so they keep making more of it. As to what kind of itch it scratches, I suppose it's a form of escapism, easy self-insert, and leveling up that make it addicting.
IMO we kind of already live in a cyberpunk dystopia, many elements of that genre have already been done in 80's, 90's and early 2000's anime.
It's impossible to predict what the next trend will be in anime after isekai tbqh. It will probably reflect some sort of change in japanese society.