Even in that case, the public key is valid. Which means, that there is a matching private key, which can be used, to sign those coins, and move them. But fortunately, the Genesis Block is unspendable, so even if you know the key, you cannot move those coins. But still: you can move all coins, which were deposited later into this P2PK, or into matching P2PKH.
Certainly, this is in fact strengthening my point! Every coin that is not burned using OP_RETURN is by definition spendable. So the coins after the genesis block
may be intentionally lost but this doesn't mean they are provenly unrecoverable!
Some of them moved, but then, they are excluded from the pattern. For example:
http://satoshiblocks.info/We have blocks from 0 to 14 with one extraNonce line, and people assume, that Satoshi mined them. But: block number 9 and 12 are explicitly excluded from the pattern, because those coins were spent.
And then, we have blocks from 15 to 25, forming another extraNonce line. And people assume, that if the first line was mined by Satoshi, then the second line also was.
Good info, thanks!