Re: do we need SHA-512?

I wanna ask if is there a need to add the SHA512 Hash generator. Ofc. the storage of the mined block gonna be bigger (difficulty gonna be changed)
but it's gonna be more safety

RIPEMD-160 is the next safety bottleneck. Changing from SHA256 to SHA512 wouldn't change the safety.

Explain to me why. The ripemd160 doesn't have that big result as SHA512 or whirlpool. Then why should be not sha512 more safely as SHA256?

mynonce thinks you are referring to the privatekey->public address sequence of events of cryptography. not block hashing which has no ripemd160.