In the context of trade-offs in my posts, I was trying to make everyone see it from what I believe is zkSNACK's viewpoint.
Okay.
Wasn't there always an open debate about taint and Bitcoin's fungibilty?
Bitcoin may seem fungible within its own protocol,
but external entities are applying “taint” information to coins, making Bitcoin infungible in practice. Most large exchanges are automatically performing risk assessment on incoming customer coins. While it’s easy to claim Bitcoin also has obvious plausible deniability, that doesn’t matter to Coinbase, Circle, Cash App, etc. They are applying taint with enough confidence to close your account.
https://medium.com/bitcoinerrorlog/bitcoin-is-not-fungible-should-it-be-620a28f3f8b1Yes, that's why it's so important for technologies like Lightning and Cross Input Signature Aggregation to find adoption since it makes private transactions cheaper than non-private transactions. Even users who don't seek privacy will have it anyways, assuming they are not foolish enough to forfeit their data/coins to a custodian.