There is a serious security flaw in billions of Intel CPUs that can let attackers steal confidential data like passwords and encryption keys. Firmware updates can fix it, but at a potential significant performance loss.
absolutely. a lot of currently in use public key schemes may be broken with those. more recently there have been a few newer algorithm such as kyber that do have a chance to hold. think NIST is also holding a bit of a competition, but dont quote me on that. i really dont know alot about post-quantum crypto