TIL: Bitcoin Core deprecated the use of private keys (legacy wallet). How is that supposed to look? When somebody opens an old wallet.dat, will the new Bitcoin Core just fail to load it and suggest to install some extra old client? Or is this feature being moved to an extension of some sorts?
Discussion
It *should* suggest using migratewallet RPC to migrate the wallet. Not sure what happens exactly.
https://bitcoincore.org/en/doc/27.0.0/rpc/wallet/migratewallet/
Indeed everything should be migrateable.