There is also the problem of embedded devices. Some of these will still be operational in 20 years, at which point a "cryptographically relevant quantum comput

There is also the problem of embedded devices. Some of these will still be operational in 20 years, at which point a "cryptographically relevant quantum computer" might exist. So we want to ensure today that these devices can support post-quantum algorithms, and depending on the device, this support might need side-channel and fault protection. In some cases we can add support with a device firmware update, but things like secure boot flows and hardware accelerators can't always be updated in the field. And we need to make sure that the devices are fast enough, have big enough key storage, RAM and packet sizes, etc to support the new algorithms.