how does ethereum or bitcoin remain decentralized with post quantum cryptography?

if we need to re-sign everything and public key + signatures x20 in size... chains are doomed to be bigger and keep getting bigger w/ nodes needing more storage and bandwidth

what am i missing?

cyberflâneur at fileverse.io ()
building a self sovereign stack ()
phd human-AI teaming in infosec

It’s an append only ledger, when don’t you get bigger chain size and nodes needling more storage and bandwidth?

pqc changes the rate of growth by a factor of 20 or more