Listened to this the other night. It was great! You said a few things I hadn't seen elsewhere that were important to hear:

- MAST could have been another opcode, and it was debated for some time

- The fact that you can have multiple spending conditions and only reveal one is MAST. The tweaking, the visibility to hide the MAST is thanks to Schnorr.

- Ty for being explicit about the two ways to spend from P2TR. When you sign the happy path, the one that only calls for a public key, you don't reveal that there ever was a MAST. However when you sign for a spending condition from the MAST, you need to reveal the public key that was tweaked and the information to reconstruct the MAST. Most people only talk about the former, which is great, but it gives people the impression that you *never* have to reveal anything about the MAST, which is not always true.