Proposer/block builder separation-friendly fee market designs

[vbuterin]

@yoavw

But any reason not to make it exponentially expensive based on the length of the stall? Under normal conditions a stall of more than 1-2 slots seems unlikely, so the exponential cost will only kick in during an attack.

I would say the main reasons to consider staying away from that are:

1. Just plain old protocol simplicity (increasing complexity introduces greater risk from unknown-unknowns)
2. Relying too much on lose-lose games (where there are penalties that do not correspond to rewards) is risky because it creates an incentive to circumvent the protocol (eg. imagine a few rounds of stalling happened, and there’s a risk a block will not get included due to network latency; proposer+builders would benefit from moving over to some layer-2 super-protocol)