Beyond what the other replies have already pointed out, the most sensible way to deploy PQ crypto today is to use it as part of a hybrid scheme. This way, even

Beyond what the other replies have already pointed out, the most sensible way to deploy PQ crypto today is to use it as part of a hybrid scheme. This way, even if the PQ crypto is broken (either fundamentally, or due to implementation bugs), the scheme as a whole will still be secure under a pre-quantum threat model - so not worse than what you started with, assuming you were using pre-quantum crypto to begin with.