What actually becomes impossible
Machines cannot be moved between floors, so any floor without equipment already on it loses its machine work entirely. Bulk waste cannot be brought down, which means bins fill and the bin store misses a night. Consumable restocking stops for the upper floors unless stock is already held there. And the crew's own movement becomes slow enough that a shift covering six floors simply cannot cover six floors.
What remains possible is meaningful: surface work, amenities where water is available, waste consolidated on the floor rather than removed, touchpoints and detail work. So the attendance still delivers if the crew knows what to prioritise. What it must not do is attempt the normal scope by carrying equipment up stairwells, which is how people get hurt and how machines get damaged. Knowing that distinction in advance is what lets the crew deliver a useful night.
