https://lists.gforge.inria.fr/pipermail/cado-nfs-discuss/2019-December/00113... More RSA was broken this month, faster, cheaper, and not even using the TOP SECRET SCI NSA tools either.
quantum supremacy is a world away from practical cryptologic capability.
Though it's probably better to not bet against some random quantum alignment occurring within someone's inventive brain (there were a couple papers recently on that process), or that when it does it will not immediately receive $B in parallel manufacturing and deployment, certainly by adversaries... But to continue developing PQC and working other defensive avenues.
defeating historical SSL/TLS key exchanges is not around the corner...
Including ones geared toward getting the Bluffdale Buffer and all others around the world formally deconstructed.