[ZiiS]

They are slower, larger, and less tested. Specifically the hope was to develop hybrids that could also provably be more pre-quantum secure then what they are replacing. History dose not favour rushing cryptography.

[bwesterb]

They are large, but they're not that slow actually. We've been testing them for almost a decade now. I agree that rushing is bad. That's why we need to start moving now, so that we're not rushing even closer to the deadline.

[Hendrikto]

You misread the comment you replied to.

[KAMSPioneer]

Which, to be fair, is easy to do because they used a triple-negative.

Rephrased, they meant to say "there is no reason to remove support for quantum-vulnerable algorithms in the near future."

IMO that's much less likely to be accidentally misinterpreted.