Removing the segregated witness would break lightning, but as far as I know the discount could be removed tomorrow with no consequences other than higher fees for opening channels, and in general for ...
my understanding is that removing the discount would not only make channel opens more expensive,
which is like "ok fine whatever"
but it would make channel *closes and justice txs 3-4x more expensive. iow, prohibitive in high fee environments, which raises the bar of what channel size it is worth publishing a justice tx for.
so someone can steal their channel partners sats and its too expensive to argue about it.
or maybe you get force closed and most of your balance goes towards paying the fees.
or your liquidity stays tied up in a channel you dont use because it's just not worth it to close at all.
LN overhead increases dramatically without the witness discount afaict.
but having a segregated witness and fixing tx malleability was good on principle.
which is like "ok fine whatever"
but it would make channel *closes and justice txs 3-4x more expensive. iow, prohibitive in high fee environments, which raises the bar of what channel size it is worth publishing a justice tx for.
so someone can steal their channel partners sats and its too expensive to argue about it.
or maybe you get force closed and most of your balance goes towards paying the fees.
or your liquidity stays tied up in a channel you dont use because it's just not worth it to close at all.
LN overhead increases dramatically without the witness discount afaict.
but having a segregated witness and fixing tx malleability was good on principle.
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