I think this is more about interfaces than algorithms. A good cryptographic RNG interface will generally not expose the ability to explicitly set the seed for a

I think this is more about interfaces than algorithms. A good cryptographic RNG interface will generally not expose the ability to explicitly set the seed for a given algorithm. Instead it would either abstract this entirely away, or provide some kind of interface for adding entropy to an entropy pool. The PRNGs themselves obviously do need to have seeds...