My suspicion is that it's important to do a lot of practice where failure is cheap and a lot of practice where failure hurts. I'll concur on that. I consider i

My suspicion is that it's important to do a lot of practice where failure is cheap and a lot of practice where failure hurts. I'll concur on that. I consider it much preferable to have tried when failure hurts (and failed) than to have a nagging regret later on ("what if I'd tried"). That's advice I take from my love life and not from chess or startups, but I hold that the (emotional) cost of failure is still very real...