What do you think of teams that are working part-time (e.g. while in full time education/employment) on an idea with decent traction, but who are waiting for external validation (such as YC or other investment) before going full-time on it? Do you take it as a sign of low commitment?
Startups are really fucking hard. You have to have a serious belief and commitment to build a billion dollar business (which is what YC is investing in.) If you're unsure, that's totally fine, but you need to be the first to believe in your company and get used to being the only ones who believe in your company, in order to make it through the hard times.