As long as there's a bit of headwind, and the runway is good and long, it's not usually a big problem - I've only seen one that made me nervous, some time back I was controlling an RJ100 or BA146 (can't remember which but they look the same to me....) which couldn't select any flap at all. Normally they have a slightly nose-down attitude on short final but this one hurtled over the threshold, a few degrees nose-up, resembling a fighter! A long rollout but no hot brake problems and the crew never sounded other than calm, so maybe they'd practised that one in the sim a few times!