In the other thread I saw people complaining about anon set, amount correlation and metadata.

nothing about cashus cryptographic assurances.

and amount correlation isnt a problem on monero since it uses ringCT.

OTOH, monero is a blockchain so it's possible to use heuristics to analyze txs, whereas ecash is perfectly hiding (FCMP fixes this)

cashu's problematic because of its trust assumptions, not because its technically suspicious.