Previously I was impressed with Wasabi's user-friendliness, but now I would say it's actually too user-friendly.
It's very easy to take actions that largely undo the benefits of mixing and the user is left unaware and with a false sense of privacy.
Discussion
What sort of actions in Wasabi would undo the benefits of your coinjoin? If you have both non-private and private coins in your wallet at the same time, the wallet selects your private inputs when making a payment.
Merging your post mix coins can create a near deterministic link since the input amounts vary (easy to do if you're using the wallet for mixing before sending on to cold storage)
I can only thing of one instance in which merging post mix coins could create a near deterministic link, which would be if you sent a single UTXO to an empty wallet, coinjoined for a single round, then swept the resulting UTXOs to cold storage.
This edge case correlation is prevented if you register a second UTXO (especially if the second UTXO is already private), remix any UTXO from the first round, or merge your coins in two separate transactions when spending.
True, but that seems like a fairly likely usage pattern for those using Wasabi purely as an intermediate mixing wallet
Hear hear.