At my start-up I got pretty much no time to train my replacement before I left. I was the technical founder / lead dev / software architect. Pretty much the ent

At my start-up I got pretty much no time to train my replacement before I left. I was the technical founder / lead dev / software architect. Pretty much the entire application came from and lived in my brain. They're still up and running and doing really well. Edit: So it doesn't seem like this is because I documented everything well and code was good. That wasn't the case. They just managed.