mempool – What’s wrong with the recent ‘fee-for-replace’ proposal?

Recently there has been a proposal to allow substitutions that beat the original only by commission rate and not by absolute commission.

Rule #3 transaction locking can be relaxed in a miner incentive-compatible manner by replacing transactions (or transaction packages) that are not eligible for replacement under existing rules.

1. The commission rate for a new transaction (package) is R It is several times higher than the commission rate of the transaction it replaces.
2. New deals (packages) have commission rates high enough to place them at the top. N Mempool’s block value.
3. The highest alternative commission rate that can be mined is not high enough to place alternative transactions at the top. N Mempool block. In this context, the highest minable alternative fee rate represents the fee rate a miner can earn by mining one or more of the alternative transactions, taking into account the unconfirmed parent.

environment r=1.25 and N=1 That would be reasonable.

I’ve seen claims that this proposal introduces infinite relay DOS vectors. How does this attack vector work?