Comment by evil-olive

still theory, but there seems to be an emerging consensus that quantum systems capable of real-world attacks are closer to fruition than most people generally assumed.

Filippo Valsorda (maintainer of Golang's crypto packages, among other things) published a summary yesterday [0] targeted at relative laypeople, with the same "we need to target 2029" bottom line.

0: https://words.filippo.io/crqc-timeline/