[bearjaws]

A) Security is always an afterthought at YC companies - I know from firsthand experience.

B) YC companies are risky to use, obviously we meme about people using IBM for "saftey", but there is an opposite side of that which is going with a seed stage company - it's very risky.

C) Even if you are a happy customer, if you are too niche they will typically abandon you. I've been on the decision making side for this, sometimes your early customers don't fit your new market, so you have to let them down slowly.

[bpodgursky]

I'm bearish on the giant YC classes but (C) is an entirely necessary evil at any successful startup anywhere.