good, thanks.
After re-reading Appendix C and other comments from this and other threads, it seems to me that atomic swaps could be executed almost "instantaneously" (1). But maybe I'm wrong.
(1) if we're considering exchanging BTC with scBTC through atomic swap, the exchange process duration should be a function of the confirmation time in btc blockchain, the sidechain's ledger
confirmation time and locktime used in the txs involved in the swap.
Almost... Well, they require sequential broadcasting of transactions (and sufficient confirmations). At least two, possibly more if there is a problem needing a refund.
So not instantaneous if you want to do it trustlessly, but a lot quicker than 100 blocks.
For delivery of contracted goods, these provide refunds, "consumer protection" built into the protocol.
It really only works for on-chain assets though.