17:58:14 <m-relay> <c​haser:monero.social> there are many Bitcoin output types (almost all modern ones) that involve hashing (scroll to the first table, those with "H" in them: https://github.com/cryptoquick/bips/blob/p2qrh/bip-0360.mediawiki#motivation). if such an address was never spent from before and the private key is lost, funds on it will be lost forever even if there's no post-quantum migration deadline.