[BIP Draft] Segregated Data: a prunable, script-isolated block region for data carriage

In the realm of blockchain transactions, particularly when discussing data embedding techniques, OP_RETURN outputs are often highlighted for their efficiency and cost-effectiveness compared to other methods such as P2PKH (Pay-to-PubKeyHash). A typical P2PKH output requires 34 bytes, where only 20 bytes are available for data storage. On the contrary, an OP_RETURN output is more space-efficient for carrying data, requiring only 11+n bytes, where n represents the payload size. Initially, the use of OP_RETURN was restricted to payloads up to 80 bytes, but this method remains advantageous in terms of overhead compared to alternatives.

Furthermore, it's crucial to understand the dynamics of competing chain tips within blockchain networks, especially in relation to propagation delays. The common perception that propagation delay significantly influences transaction confirmations and the outcome of races between chain tips might be overstated. This insight is essential for developers and participants in the blockchain ecosystem to make informed decisions about transaction methods and to understand the underlying mechanics affecting transaction verifications and block additions.