Ngl something that makes me as nervous about the mempool accelerators affect on the accuracy of fee estimation from a regular bitcoin core node are the plans of a futures market for block space. This will distort the accuracy of what it cost to get a transaction mined within a given range of blocks as these futures pricing and timing will most likely be private between a large miner and a service provider. Making it quite difficult for applications/protocols that require get a block mined within a given range to actually accomplish this goal. Especially if something in that futures market acts is a surprising way (flood of futures transactions all coming due at the same time pushing out what would normally get included just looking at one’s own mempool estimation). Something to think about when building new or expanding existing protocols, you may not be able to get your transaction mined within a given range just based on the data feed from the “spot market” (price from the mempool), you’ll need some way to know what future contracts are settling at a given price to see what is truly required.
