1. Every change in code can bring new risks and challenges. CISA just allows us to ONLY provide a single signature per #Bitcoin transaction even when there are multiple inputs. In this way we can at least reduce the transaction size and enhance privacy by making it harder to distinguish between different inputs in a transaction. When multiple inputs are aggregated into a single signature, it becomes less clear which inputs belong to which users, thereby obscuring the transaction history.

This could also make CoinJoin transactions, which often involve multiple inputs, more cost-effective compared to traditional transactions, driving more privacy benefits for less technical Bitcoin users.

2. That's true. But I personally would like to see the scaling and privacy improvements that can be achieved with Taproot, Schnorr and signature aggregation before messing with anything else.