Thanks for this EIP! I have a question:
Would this support the use of private keys? I have a bunch of keystore files and private keys which I’d love to airgap, but so far haven’t found a way to do so because afaik no HW wallet supports private key import. The usual recommendation is to move funds over to a new, mnemonic based, account. But for old accounts with a lot of different tokens accumulated, some of which deposited in protocols, that can easily translate to xxxx $ worth of tx fees.
My limited understanding of BIP32 and this EIP suggests it may not work with private keys either.
Is that the case? If so, is there a good reason for not supporting the use of private keys? Could the EIP be changed / extended to have that supported too?