On whether or not regulators would be against or in favor of #Bip300, I think the strongest case to be made is that they would certainly be against it.
Think about it. Bip300 could enable a #drivechain that allows bitcoiners to anonymize their #BTC through a trustless setup.
Regulators hate #privacy #crypto like #XMR but maybe they can live with it and afford to force exchanges delisting because the #Monero brand isn’t as strong as the #Bitcoin brand but imagine combining strong privacy with the reach of the Bitcoin brand. It would seem like a regulatory nightmare.
Regulators definitely don’t want a private Bitcoin to see the light of the day and for this single reason they would oppose Bip300 not support it.