What article is missing is the (hierarchy of) permission.

Who can create money, who can access it, who can change the rules, who can freeze or censor transactions or even weaponize whole financial system?

What I dislike about fiat is that inflation is treated as a (wanted) feature while it is a cost paid by plebs via Cantillon effect.

All Govs keep rolling debt burden being paid with more debt.

Paper backed by paper and/or trust into goverments only. History and significant part of the world shows that this trust is being failed too often.

How sustainable current system is?