[diroussel]

How do you make a traditional database immutable? Who controls writes and updates? Well it’s a matter of consensus.

[pards]

Blockchains are not immutable - the DAO hack and subsequent hard-fork proved that to the tune of millions of dollars.

[zeroxfe]

That was a fork, not a mutation of the database. You can still today go back and see the history play out in the different chains.

[pphysch]

Who determines if competing companies are entering authentic data into the communal blockchain? How do you address a consensus attack in an aggressively competitive industry with relatively few players?

Immutable garbage is still garbage.

Databases are perfectly compatible with any variety of authentication layers.