In article ,
David Walters wrote:
Is that a safety thing? If you slip you will stop at the next landing
rather than tumbling all the way to the bottom. It seems rare to find
very long unbroken flights of stairs.

I think it's more of a gradient thing - comfortable escalators have
a lower gradient than comfortable stairs. After all, falling that
distance down an escalator is going to hurt quite a lot, and LuL
does have rather long escalators.

--
Mike Bristow