Never had an interview, I suspect (as mentioned in other threads) they see "solo-founder" and skip.
Doesn't matter that I've brought together a team, raised funding, and that we have paying customers, leading tech, etc. etc.
In our case, the other founder is very much a part of this company but we didn't have to transfer 10% equity and that never a concern with any of us. We are in prototyping stage and equity distribution right now was not our top concern.
So only one founder filled the Founder's Form and everyone was there in the video.
I didn't know YC S18 had a rule of "No SOLO founders".
And that they won't even check our application properly because of that.
I'm hoping there's still hope that a motivated and disciplined individual, today, can strive towards what might as morally well be their American (read: capitalist) birthright. I think it was someone at YC who stripped my self-defeating default to dismissal of the idea of becoming a lower middle class American owner when they wrote, "Build something users love, and spend less than you make. How hard is that?"