It looks like OP is in the process of building a prototype, so I was curious how many idea stage or prototype in development stage companies YC accepts? YC has

It looks like OP is in the process of building a prototype, so I was curious how many idea stage or prototype in development stage companies YC accepts? YC has stated that they accept companies in all stages of their life cycle, which is probably true, but from a distance it looks like most accepted companies either have significant revenue, traction or both.