

AES-256 is fine actually. The best known quantum attack reduces key strength from 256 bits to 254.4 bits. The problem is that in order to use AES (which is a symmetric encryption scheme) you need to exchange keys using an asymmetric system like RSA, which is known to be weak to quantum attacks.

Strong disagree. I ran non-ECC memory on my server and services would unexpectedly crash maybe once per week. Over the span of a year I had two databases get corrupted that cost me a lot of time to fix. I tried swapping sticks but it happened with all of them. I switched to ECC memory and the problems disappeared. I needed more memory anyway and the price delta for ECC was about $100. I didn’t have to swap CPUs or anything, AMD desktop CPUs and chipsets support it out of the box. ECC memory is absolutely worth it.