News for hackers. Stuff that matters.
Re:Taproot, Bitcoin’s long-anticipated upgrade, has activated by tromp on Monday November 15, 2021 @09:17AM (#29227642)
> the latest state will go on chain

You'll need to have a revocation mechanism to punish older states being put on chain. That may not be so simple when (many) more than 2 parties are involved.

> Or it could be "BMW did ten thousand transactions with its suppliers". You don't know.

Amounts are still visible as well as number of entities paid by the settlement. Recipients may become identifiable through follow-up transactions or re-use of known public keys.

> And all of the transactions were free

All but the initial funding tx and the final settlement tx.

Re:Taproot, Bitcoin’s long-anticipated upgrade, has activated by TekMol on Monday November 15, 2021 @09:23AM (#29227717)
Yes, it will probably take years before we all settle on standardized ways of doing these things. But in theory, they are possible now.

Yes, the initial tx and the final tx will provide data for forensic analysis.

Yes, the initial and final tx need some time to settle (something like an hour) and cost some money (something like a few dollars at current rates).