If this is your use-case, private serial pk and fully random public identifiers is a better trade off than uuid. V4 is inefficient as a pk and v7 leaks info too.
Many business don’t really have super secret customers/growth and don’t need to hide that info, but if you feel you do you can transition to uuidv4 (not v7) for public identifiers while keeping an efficient pk.
If this is your use-case, private serial pk and fully random public identifiers is a better trade off than uuid. V4 is inefficient as a pk and v7 leaks info too.
Many business don’t really have super secret customers/growth and don’t need to hide that info, but if you feel you do you can transition to uuidv4 (not v7) for public identifiers while keeping an efficient pk.