On Sat, Jun 3, 2023 at 9:49 AM Joost Jager <joost.jager@gmail.com> wrote:
The removal of the need for a commitment transaction also enables the inclusion of data within a single transaction that relies on its own transaction identifier (txid). This is possible because the txid calculation does not incorporate the annex, where the data would be housed. This feature can be beneficial in scenarios that require the emulation of covenants through the use of presigned transactions involving an ephemeral signer.

I think this avoidance of a circular reference is also why LN-Symmetry uses the annex?

Joost