What a load of bollocks... Blockchain thoroughly sucks as a 1:1 replacement for a database - it's more expensive and more complicated for no benefit (see BSV and other gigameg experiments). Immutability an non-fungibility in these scenarios is a hindrance, not an advantage. If your name is spelled wrong on the deed, you will want it corrected, not get told to fuck off. So while trying to fit this shit into a blockchain we'll end up with all sorts of exceptions and "master keys" and other nonsense.

Blockchain is great for a distributed trustless ledger. Using it for inherently centralized databases is stupid and probably fraud in most cases where "experts" are trying to sell it as such.