Today’s quiet mempool isn’t a danger—the subsidy still secures the chain—but the new unlimited-blob rule is permanent and will let the subsequent spam wave stuff blocks, driving up disk, RAM, and bandwidth costs until only datacentres can afford to run nodes. Meanwhile fast off-chain payment networks are on track to reach global scale within a couple of years, so real payment traffic—not chain-bloating uploads—will feed the fee market once the subsidy is gone; if we don’t keep block weight in check now, we’ll end up with Ethereum-style centralised validation just as those fees finally arrive.