I had no idea that taproot was presented, among other things, as a potential improvement with respect to QC threats. How could this have been given the exposed pubkey? Am I missing something either in my understanding of how taproot works or more generally?

Also what debate are you referring to? I'd like to know more, thanks

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Me too. I was surprised to read Taproot exposes public keys again. Where's this debate?

It has always been this way. Search for "quantum taproot" on Twitter and you will see comments from over two years ago regarding this matter.

Nah, I meant: I thought we had transitioned to using key-hashes for initial commitments, but with taproot we're back to immediately exposing public keys.