Im not saying we need good spam I just pointing out that the noise in the chain does buffers the chain from a very specific and vanilla attack. The spam gets in the way of other transactions and fills otherwise empty blocks, which spreads out the timeline and increases the cost of a basic utxo attack involving 1in 25 out transactions that are bip110 complaint is all that is needed. A nation state could make a determined effort with these regular bip 110 compliant transactions and spend under a billion dollar and have pleb nodes knock offline in 2 months. They could spend considerably less and drag that timeline out to 8 months. In either case the bip110 chain becomes captured before the temporary rules expire. The only defense is adopting utreexo, but as we have learned a lot of knotzi run their nodes in bandwidth limited environments so that solution is probably no good. The speed of such attack is a bigger problem than the actual higher ram requirements. Adapting the network to better hardware is normal. Having to do it in 2 months is not.