Example Phrase Using Today's Word: Se debe usar el ascensor o las escaleras automáticas.

I recently discovered that "escalator" is plural in Spanish. Makes perfect sense. I mean, if "escalator" is singular in English, why are stairs plural?

I can see the argument for plurality (pluralism? both of these words have totally other and unintended meanings here) or singularity (singularism?), but it seems like a language should really pick one for both stairs and escalators and stick with it.