Didn’t have time to watch the whole thing, but Segwit and Taproot were even more elegant than Wicked explained in the first few minutes. The new rules only apply to blocks that contain segwit inputs or taproot inputs respectively.
Regarding segwit, if your block does not contain any segwit transactions, it doesn’t require the newly introduced witness commitment. As unupgraded nodes would consider transaction inputs following the new rules non-standard, they would not collect such transactions into their mempool and not include them in their block templates. Throughout segwit signaling, and even after segwit was activated, unupgraded miners could therefore still build valid blocks that simply did not include any segwit transactions.
For Taproot similarly, transactions containing P2TR inputs would be considered non-standard, and miners would not include them by default.
Since neither of these two soft forks’ deployment mechanisms had a mandatory signaling phase, unupgraded miners would just chug along fine on the same chain throughout signaling and even after activation, beyond potentially missing out on juicy segwit/taproot transactions.
Didn’t have time to watch the whole thing, but Segwit and Taproot were even more elegant than Wicked explained in the first few minutes. The new rules only apply to blocks that contain segwit inputs or taproot inputs respectively.
Regarding segwit, if your block does not contain any segwit transactions, it doesn’t require the newly introduced witness commitment. As unupgraded nodes would consider transaction inputs following the new rules non-standard, they would not collect such transactions into their mempool and not include them in their block templates. Throughout segwit signaling, and even after segwit was activated, unupgraded miners could therefore still build valid blocks that simply did not include any segwit transactions.
For Taproot similarly, transactions containing P2TR inputs would be considered non-standard, and miners would not include them by default.
Since neither of these two soft forks’ deployment mechanisms had a mandatory signaling phase, unupgraded miners would just chug along fine on the same chain throughout signaling and even after activation, beyond potentially missing out on juicy segwit/taproot transactions.