Why do people love this dumb trope so much, but execute it terribly every time? He didn't notice the date was wrong by more than a decade? He said the manga volume he bought was old, but it's apparently 22 years old and he didn't realize that? You want the MC to have an existential crisis? Show us someone completely different living there like he never existed at all, or show us the MMORPG nolifer is still doing what he always did and our MC doesn't have a life to go back to.