Oka, 1 month ago

• Reincarnated: Living Life in Another World
• Reincarnated as a Slime
• Re:Zero (IIRC)

Yeah, I agree the genre has come down to a basic recipe.

There are some exceptions:

• Sword Art Online, technically an issekai, but only because they are trapped in the other world.
• The Devil is a Part-Timer, reverse issekai where something foreign and god-like comes to the real world and becomes mortal