Looks like my quotes didn't go as expected.
"Platform and Endorsement seeds generally are stable, but the command set
Does allow for ChangeEPS and ChangeSPS commands. But I don't think I have
ever seen a production TPM support this, but be aware that it exists."
"Also on the note of re-generating primary keys, you may find my previous thread
unique data option in tpm2_createprimary helpful if you want to use unique data in
addition to the seed."