There's little information that is actually about post quantum encryption algorithms, just the need for them in a world where quantum computers are shown to be

There's little information that is actually about post quantum encryption algorithms, just the need for them in a world where quantum computers are shown to be practical. IMO it also overstates the risk to symmetric keys - Grover's search is a sqrt(N) improvement in performance, logically reducing key length by 50%. For modern systems using aes256 that reduces complexity to that of aes128, which is still considered secure - it is of course a problem for aes128 though, but everyone has already moved to aes256, right? (I kid, there are still systems that accept DES which has been insecure against classical computers for many years)