Five years have passed since the activation of the Taproot upgrade on the Bitcoin network — one of the most significant protocol upgrades in its entire history. The softfork's main promise was privacy: to hide the complex logic of multisignature wallets behind the appearance of an ordinary transaction. However, reality turned out to be more complicated than marketing slogans, and today it is important to soberly assess where Taproot actually hides multisignature and where it gives it away.
What Taproot promised and what actually happened
Taproot's key innovation is the mechanism of Schnorr signatures and the MAST (Merkelized Alternative Script Trees) structure. In the ideal configuration — the so-called key path spend — a multisignature wallet spends funds as a single public key, and an outside observer cannot distinguish such a transaction from a simple payment by a single user. This fundamentally improves both privacy and fee efficiency.
However, when using the script path — when the parties are forced to reveal one of the branches of the condition tree — the complexity of the transaction becomes visible. Moreover, the very structure of the scripts and their size can reveal the wallet type. In practice, a significant portion of multisignature solutions still use the outdated P2SH and P2WSH constructions, which Taproot does not mask at all.
The migration problem: how to move without linking storages
A separate challenge is the transition to new Taproot wallets. A direct transfer of funds from an old address to a new one creates an on-chain link between the former and the new storage, which devalues the very idea of improving privacy. A competent migration requires either the use of intermediary mechanisms — for example, mixers or coinjoin protocols — or careful planning with transactions spaced out over time and links broken by amounts and addresses.
That is precisely why the topic of migration privacy remains painful: a user who decides to switch to Taproot for the sake of confidentiality risks compromising it themselves through a careless transfer.
Network statistics demonstrate a gradual but uneven growth in the share of Taproot transactions. Large custodial services and exchanges are implementing support slowly, and retail users often see no practical benefit from switching. As a result, the technology's potential is far from fully realized.
Cryptalist analysis: Five years later, Taproot remains a technically powerful but underused privacy tool. The actual level of multisignature masking depends not on the protocol itself, but on the discipline of wallet developers and user behavior during migration. Without a mass transition to key path spend and a competent migration strategy, the promise of "indistinguishability" will remain more theoretical than practical.