I might not have time to continue this discussion.
Try this:
If standard vesting terms make you nearly indifferent to your co founder leaving, or to being fired, then they are perfect for you and you should definitely go for it.
Otherwise, you want some other kind of agreement with your co founders. It's not likely that the ideal agreement is one you can enforce through the weak economic incentives you can put in your corporate agreements (constrained by enforceability, tax considerations, what would totally freak out later investors or acquirers, etc). You will just have to rely on loyalty, integrity, etc. And it's fairly well known that adding weak but salient economic incentives to strong moral ones has a perverse effect. I don't think I can explain this any more clearly.
(And if you can't completely trust your partners, why worry about them leaving, but not about them colluding to fire you and repurchase a bunch of your stock? And isn't the prospect of a high stakes negotiation that could blow up your company a stronger incentive than losing some predictable fraction of equity?)
No matter what you do, there will be risks. I think what balance of risks is best depends on you, your partners, and your situation. We are in full agreement that you should address this issue, in one way or another, early.
(It hasn't been that long since I've raised money from a "real VC", but who knows? I'm happy to leave that out of the conversation)
What if I'm not "indifferent" to whether my cofounders stay, but also can't see into the future? What if I'd like the option to continue a functional company even if one or more members of my team decide that it isn't a fit?
Why am I more worried about this situation than the ones where my partners conspire against me to steal my stake in the company? Because the situation I'm describing happens all the time, and, as I mentioned upthread, easily happen even when every party is acting in good faith.
ps
I have a pair of friends who went in on a YC company together. The partnership didn't work out; one left to join and eventually lead another YC company, the other stayed. Both founders had strong, liquidity-event exits afterwards (within months of each other, in fact). Nobody foresaw the partnership failing, but this (super ultra common) eventually was handled by the book, and everyone won in the end. I'm, again, having a hard time seeing the net downside of vesting.
Try this:
If standard vesting terms make you nearly indifferent to your co founder leaving, or to being fired, then they are perfect for you and you should definitely go for it.
Otherwise, you want some other kind of agreement with your co founders. It's not likely that the ideal agreement is one you can enforce through the weak economic incentives you can put in your corporate agreements (constrained by enforceability, tax considerations, what would totally freak out later investors or acquirers, etc). You will just have to rely on loyalty, integrity, etc. And it's fairly well known that adding weak but salient economic incentives to strong moral ones has a perverse effect. I don't think I can explain this any more clearly.
(And if you can't completely trust your partners, why worry about them leaving, but not about them colluding to fire you and repurchase a bunch of your stock? And isn't the prospect of a high stakes negotiation that could blow up your company a stronger incentive than losing some predictable fraction of equity?)
No matter what you do, there will be risks. I think what balance of risks is best depends on you, your partners, and your situation. We are in full agreement that you should address this issue, in one way or another, early.
(It hasn't been that long since I've raised money from a "real VC", but who knows? I'm happy to leave that out of the conversation)