[est31]

The advantage of algorithms like Argon2 is that they are way harder to implement scalably in hardware than SHA256 is. Or in other words, it's easy to build an ASIC that's 1000x as powerful to compute SHA256 hashes as a recent Intel CPU than to build something that's 1000x as powerful to compute Argon2 hashes. You might still be able to, but then power usage is hopefully closer to a 1000-fold of the Intel CPU than the SHA256-ASIC is.