I think so, yes. But also, it's a different time now. I'd have had more progress by the time I applied to YC. For some companies, in a week, good hackers can

I think so, yes. But also, it's a different time now. I'd have had more progress by the time I applied to YC. For some companies, in a week, good hackers can get a prototype built and have a few initial users. If that's possible, we expect it. If you are building a nuclear reactor we do not expect a prototype at interviews. However, we did have a rocket company bring a prototype engine to interviews.