The scrypt-derived yescrypt participated alongside argon2 in the PHC[1], and argon2 was chosen in favour of it – mainly because scrypt is a bloody complex mess to implement –, but yescrypt is still recommended if you need backwards compatibility with it.<p>[1](<a href="https:&#x2F;&#x2F;password-hashing.net&#x2F;" rel="nofollow">https:&#x2F;&#x2F;password-hashing.net&#x2F;</a>)