I briefly read discussion on newsletter[1] and BIP pull[2] and as expected it receive mixed response.
I don't see much of a purpose for "vaulting" and "unvaulting" funds as it seems to serve the same purpose and doesn't add much/any extra security than a multisig might.
I disagree. Per the author,
Vaults are an especially useful kind of covenant that give Bitcoin users operational simplicity
during expected use, but heightened security in the event of unauthorized access to private keys
Taproot with specific spending condition can achieve similar thing. The paper also mention usage of watchtower to monitor unexpected unvaulting, which is what watchtower for LN does when it detect attempt to spend earlier state of LN channel.
I re-read that thread, but didn't see anyone mentioning OP_VAULT.
[1]
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2023-January/021318.html[2]
https://github.com/bitcoin/bitcoin/pull/26857