On 757/767 for charter airline - as the FMCs are only 200k, and we fly to a lot of places, the navigation department struggle to fit all the airfields, approaches, and navaids in to the limited space available. As such, there isn't room for any company routes, so all the flight plans go in manually - anything up to 10 hours across the pond! It's not actually that big a deal, doesn't take too long.
NW3