Further thoughts: With blockchain titles, it’s impossible to transfer property without the owner’s consent (or the consent of a majority of key holders, if that’s the design).

However, there are legitimate scenarios where a property has to be transferred without the owner’s consent. (e.g. divorce judgement, mortgage default)

There are also illegitimate scenarios that governments love. (e.g. non-payment of taxes, asset forfeiture, eminent domain) If governments are going to support blockchain titles, they may insist on backdoors like a copy of the owner’s private key or a controlling interest in the title’s signing keys.